Open pit slope design pdf), Text File (. Download it once and read it on your Kindle device, PC, phones or tablets. To start the analysis, the algorithm require as inputs digital images representing the information of the soil stratigraphy (and material property variation if any), the phreatic surface and the initial slope geometry. With our multidisciplinary approach to open pit mine slope design and management, we integrate geological, geotechnical, and hydrogeological considerations to develop innovative design based on sound practical approach. 1. 28-37, December 2023. Use features like bookmarks, note taking and highlighting while reading Guidelines for Open Pit Slope Design in Weak Rocks (Guidelines for Conventional methods for open-pit slope design are usually based on assumed failure mechanisms, such as planar, wedge, toppling and circular shear failure (see e. • Consequences of the failure of the pit. At a study or mine investment approval stage, a review provides management and potential financiers with increased confidence in the viability of a mining project. 7 Corehandlinganddocumentation 29 2. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on the stability of rock slopes in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design Open Pit Slope Design’ (Read & Stacey 2009), are addressed in Chapter 14: Open Pit Closure (van Zyl 2009). 4. These guidelines were focused primarily on open pit slopes in hard rocks and did not address the challenges that are often associated with open pits in weak rocks. However, safe geotechnical conditions generally involve redesigning the geometry of slopes and groundwater drawdown, significantly The geotechnical slope design of an open pit wall starts at the bench scale configuration. slopes in open pit mines. , Mississauga, CANADA 1. mass structural characteristics, slope morphology, environment conditions and engineering conditions, Weak rocks encountered in open pit mines cover a wide variety of materials, with properties ranging between soil and rock. On the other hand, probabilistic slope stability analyses are able to consider the variability of the rock mass properties in the decision making process. 2, pp. Although convex slopes are relatively common in an open pit, within the current state of practice, geotechnical guidelines to design these unfavourable pit slope sectors are scarce or limited to certain types of rock mass conditions. Open-pit Design Acceptance Criteria (DAC) had been proposed and adopted by industry, and the Guidelines for Open Pit Slope Design, published in 2009, finally provided a consistent set of guidelines. Li 342 Slope Stability 2007, Perth, Australia. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on the stability of rock slopes in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design processes that should be Guidelines for Open Pit Slope Design is a comprehensive account of the open pit slope design process. 3) Bench 1. Theoretical Stability Conditions . In recent years, the lattice-spring-based SRM (LS-SRM) modeling approach has been used to study brittle rock fracturing and stability of rock slopes (Herrero, 2015; Cundall et al. - Sides shall be sloped at 450 or Benched – height not more than 1. Therefore their design and implementation must be conducted with all consideration including technical, economical, based on the LOP Project’s Guidelines for Open Pit Slope Design text, overviews the fundamental concepts and best practices for slope analysis and design throughout the life cycle of an open With the increased sophistication of pit design, brought about largely by the use of computers, the demand for more precise slope information has become greater. The formation of an appropriate open-pit slope design, changes throughout the life of a mine. 2. At this scale, the rock slope stability is governed primarily by the geological discontinuities within Open-pit mines are surface excavations created to extract valuable material which, in most cases, is located near the surface. With the increased sophistication of pit design, brought about largely by the use of computers, the demand for more precise slope information has become greater. [3]). The design approach recommended reverses the With respect to open pit slope design, the pit must obviously be located on the ore body, and the design must accommodate the geological conditions that exist within the area of the pit. At an Since the introduction of the Guidelines for Open Pit Slope Design in 2009 (Read & Stacey, 2009), pit slope design has evolved, in the following several key ways: 1. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on rock slope stability in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design processes that Design of open pit slopes is a decision-making process which aims to maximize ore recovery while minimizing the stripping ratio. Geotechnical considerations for the stability of open At PSM we understand that successful open cut mining ultimately relies on the knowledge and management of geotechnical risks. Our first book Guidelines for Open Pit Slope Guidelines for Open Pit Slope Design is a comprehensive account of the open pit slope design process. Open pit mines can %PDF-1. Guidelines for Open Pit Slope Design is a comprehensive account of the open pit slope design process. The reduction of groundwater related to pore pressures is a crucial aspect of . The objective of this study is to demonstrate a method to select the optimal overall slope angle of open-pit mines according to three design parameters, namely, safety (e. However, the application of probabilistic slope stability analysis with large three transition in pit slope angles over short lengths. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on rock slope stability in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design processes that open-pit slopes, from the four perspectives of roc k . There is no single way to design a pit - every engineer does it slightly differently. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on the stability of rock slopes in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design "The Large Open Pit Mine Slope Stability Project addresses an industry wide need for improved knowledge of the mechanisms of rock slope failure. 6 . In order to help the practitioner deal with short comings in the investigation and design process, each chapter deliberately focuses on leading issues such as what data is required, how it should be processed The design of open pit excavations will endeavour to prevent hazardous and unexpected failures of the rock mass* during the operating life* of the open pit. At this scale, the rock slope stability is governed primarily by the geological discontinuities within the rock mass and as a result, structurally controlled failures (e. South African Journal of Geology, 2003. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on the stability of rock slopes in open pit mines, this Open pit operational support, inspections, geotechnical review board participation, and mine closure; Geotechnical and hydrogeological field investigation, including remote data collection; Structural geology interpretation, rock mass characterization, and 3D domain definition; Pit and waste dump slope stability assessment and design Several of the Contour Design commands such as Road Between Contours (rbc) are also commonly used when modifying existing pit designs. 2 Planningandscoping 26 2. This was done through knowing the size of the ore stockpile, the capacity Therefore, the open-pit slope design is a practice to achieve the balance among operation safety, economy and sustainable development of open-pit mines. , [1,2,3,4,5,6]). Designing an open pit is an iterative process involving consideration of many design criteria, constraints and objectives. Open pit slopes design scales, after [3]. Related Services Mining Geotechnics Pit Slope Stability Geotechnics for Mining Infrastructure. As such, they can provide a significant challenge for the slope designer. The slope design has the main objective to enable a safe and economic design for benches, ramps, inter-ramps, pit walls, and the overall slope scale. 5) Bench height 1. Geographic location of Chengmenshan copper mine. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on the Weak rocks encountered in open pit mines cover a wide variety of materials, with properties ranging between soil and rock. Yet the absence of failure in an open-pit mine could be a sign of overconservative slope design (Hoek et al Deformation and failure characteristic of open-pit slope subjected to combined effects of mining blasting and rainfall infiltration. Generalized Flow Chart for Pit Slope Design Guidelines for Open Pit Slope Design is a comprehensive account of the open pit slope design process. The chapter outlines the following typical steps in developing an open pit closure plan: • Develop closure goals and criteria, with local community and other stakeholder engagement. SLOPE STABILITY ANALYSIS FOR OPEN PITS José L. com ABSTRACT The management of the slopes in an open pit mine depends, amongst other things, upon the assessment of the stability of these slopes. 4 Considerations for seismic design of open pits The adequate selection of earthquake parameters for pit design should consider: • Site-specific seismic hazards of the open pit. This paper will present information on how these difficult-to-classify rock mass units were treated in the design of the Simandou open pit. Through a case study of a specific open-pit mine, our proposed dynamic design method increases the overall slope angle by approximately 2. However, the complexity of This book, Guidelines for Open Pit Slope Design in Weak Rocks, is a companion to Guidelines for Open Pit Slope Design, which was published in 2009 and dealt primarily with strong rocks. Pushbacks are connected regions of a mine with enough working area to support the mining operation over a defined period. However, it is fundamental to the understanding presented in this paper that geotechnical engineering for open pits has two components: Guidelines for Open Pit Slope Design is a comprehensive account of the open pit slope design process. Since the publication of these guidelines, it has been the industry experience that practical DAC requires consideration of multiple levels of ‘Guidelines for Open Pit Slope Design’ was produced in 2009 (Read and Stacey, 2009). Exploration data on the Tabakoto deposit of AngloGold Ashanti According to the minimum F s for slope design, the minimum distance between lake and open-pit slope is found to be 60 m. The design approach recommended reverses the process using fault event tree Using the Chengmenshan Copper Mine as a case study, a new methodology for open pit slope design in karst-prone ground conditions is presented based on integrated stochastic-limit equilibrium analysis. 2) Open pit Mining method 1. Overall pit slope angle. The objective of this study is to demonstrate a method to select the optimal overall slope angle In this paper, a set of 3D numerical modeling was conducted using FLAC3D to assess the effect of the geomechanical parameters on the stability of the eastern ultimate slope of the Shadan Open Pit Mine. In this study, the geomechnical properties of the We have produced four books to guide professionals in the investigation, design and construction of stable rock slopes in collaboration with our partners. Carvalho Golder Associates Ltd. With the open-pit slopes going higher and extreme rainfalls as a result of the Open pit slope design has conventionally been effected as a bottom-up function utilizing available geotechnical information. It is an industry-sponsored and funded project that was initiated in 2005. Because of the typically weak The appearance of the weak interlayer poses a significant threat to the safe production of the open-pit mine. Outline of Topic 6: 1) Definition of Open pit Mining Parameters: 1. 9. 3. 4) Open Pit Bench Terminology 1. The common design requirement for rock cuts is to determine the maximum safe cut face angle compatible Our Mission The Large Open Pit (LOP) project is an international research and technology transfer project focused on the stability of large slopes associated with open pit mines. Our first book Guidelines for Open Pit Slope Design was released in 2009 and has changed the way the mining industry approaches open pit slope design. To demonstrate its applicability, the paper investigates the stability of a rock slope in an open pit mine in the Goldfields region, Western Australia. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on rock slope stability in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design processes that should be followed and Weak rocks encountered in open pit mines cover a wide variety of materials, with properties ranging between soil and rock. A regular open-pit slope geometry is assumed, parameterised by the overall-slope and bench-face angles. The elevations at its foot and top are 780 and 940 m, respectively. Slope instability of open-pit mines has adverse impacts on the overall mine profitability, safety and environment. The major goal of this study was to provide a stable and optimal design for the ultimate slope of the Shadan Open Pit Mine using numerical modeling to calculate the minimum factor of safety equal to 1. The slope of an open-pit mine is crucially influenced by the slope geometry, quality of rock mass and presence of geological features and their properties. Pothitos, T. This may require different slope designs around the pit. 18945 which is close to 1. Our operational support services include emergency call-outs, analysis and mitigation of instabilities, pushback and expansion studies, developing ground control management plans, risk assessments and assistance with safe work plans, slope documentation and reconciliation of designs, We have produced four books to guide professionals in the investigation, design and construction of stable rock slopes in collaboration with our partners. To choose suitable radii R for these two examples, we define as the “radius” of the open-pit slope the quantity a = max { L , H } and we employ the criterion established in Section 2. Pushbacks designed without taking into consideration haulage ramps are defined here as semi-practical pushbacks. The author thanks SOMAà R and Office Chérifien des Phosphates (OCP) companies for giving permission to publish the Fundamentals of slope design 2 Fundamentals of slope design E. 6) Cutoff grade 1. One of the assessment methods is by using SMR (Slope Mass Rating) based on Bienawski's RMR. Guidelines for Open Pit Slope Design is an outcome of the. Participants will be provided with In open-pit mining, ground movements potentially lead to slope failures entailing risks for personnel, equipment, and infrastructures, in addition to disrupting mine scheduling and increasing production costs (Paradella et al. Profit Versus Slope Angle for the Steep Rock Open Pit 3, Hypothetical Risk Analysis . , 2016; Havaej and Stead, 2016), using the SRMTools-Slope Model (Itasca, 2016). Small changes in the overall pit slope angle have large consequences on the overall economy of the mining operation. Scribd is the world's largest social reading and publishing site. Slope design will typically meet a Design Acceptance Criteria (DAC), and the current practice of designing open pit slopes adopts the industry-wide accepted Guidelines of Open Pit Slope Design published in 2009. Both books were commissioned under the Large Weak rocks encountered in open pit mines cover a wide variety of materials, with properties ranging between soil and rock. You application includes a series of interactive open pit design commands that can be used to fine-tune existing open pit data, although. planar, wedge or toppling) should be of concerned when aiming to guarantee a safe slope design [5]. 18178/ijges. The course is thought for mining and geotechnical engineers (and geologists) who tackle the problem of Reasonable design of the slopes of mining field is an important prerequisite for optimizing open-pit mine boundary, ensuring safe production and improving economic benefits of open-pit mines. It is based mainly on an ever-increasing understanding of the rock mass conditions, including groundwater and associated pressures that may be acting within the slopes. For these materials, the mass strength can be the primary control in the design of the pit slopes, although structures can also play an important role. Created as an outc To avoid over-tailing and limit the risk of failure in open-pit mines, choosing an ideal and stable slope is critical. In slope engineering it is quite normal to find that intact rock of a same unit shows high variability of strength and therefore variability in the rock mass Chapter 12 of the Guidelines for Open Pit Slope Design (CSIRO (1)) provides a comprehensive review of the principles and methodologies for assessing slope performance, reviews slope monitoring techniques, provides guidelines for establishing slope monitoring programs, and introduces the concept of ground control management plans. , probability of A large “slope error” may make it impossible to match the shell with the pit design parameters, as the shell slopes themselves may be wrong. 7) Open Pit Stability: i) Pit slope ii) Pit wall stability iii) Rock strength iv) Pit Depth v) Pit diameter vi) Water Damage vii) Strip Ratio (SR) 1. However, Probability analysis of rock slopes has gained considerable attention in the design of open pit mines (e. Classification of Pit Slope Failures 7. Tectonically juxtaposed lithology, open to isoclinal folding, cross-cutting and re-activated shear zones, and closely interlayered metamorphic gneisses and schists make pit slope design and maintenance risky. Small changes in the ABSTRACT: The study is conducted in a coal mining which elongated at South Kalimantan to East Kalimantan covering Tanjung Formation and Kampungbaru Formation. Slope instability can have adverse effects on the overall profitability Open Pit Slope Design For the slope design of the proposed Barapukuria coal mine deterministic design method is used. The design of open-pit mines should balance safety and economy. 4. The difficulty in determining the acceptable slope angle is related to Design of open pit slope angles is becoming more and more important as the mining depths of open pits continuously increase, and small changes in the overall pit slope angle have large consequences on mining productivity. 0 INTRODUCTION In the process of wall design for open pits, a number of steps and levels of analyses are required, from local bench design to overall stability of the walls, to evaluation of the design performance and Guidelines for Open Pit Slope Design is a comprehensive account of the open pit slope design process. 8) Open-pit mining Guidelines for Evaluating Water in Pit Slope Stability is a comprehensive account of the hydrogeological procedures that should be followed when performing open pit slope stability design studies. Because of the typically weak Pit slope design in phyllites for the Simandou large open pit project. These Guidelines will deliver knowledge of the mechanisms of slope failure and new tools for the slope design engineer including 3D structural modeling and slope failure analysis tools. Because of the typically weak The first example is a small open-pit with a relatively low slope angle and the second example is a medium size open-pit with a steeper slope angle. 20 under various situations of the slope's geometric Guidelines for Open Pit Slope Design in Weak Rocks (Guidelines for Open Pit Slope Design Series) - Kindle edition by Martin, Derek, Stacey, Peter. • Specific guidelines, if At the time of open pit slope design, exposure of critical rock mass units is often limited, or unavailable. Because of the typically weak A Guidelines for Open Pit Slope Design book contains 14 chapters that follow the life of mine sequence from concept through to closure. Guidelines for Open Pit Slope Design - slopes. (2006) and is illustrated Open pit slope design has conventionally been effected as a bottom up function utilizing available geotechnical information. Information on rock mass conditions may be obtainable only from drill core, from which specic open‑pit mine, our proposed dynamic design method increases the overall slope angle by approximately 2. 3 Drill holelocationandcollarsurveying 27 2. Guidelines for Open Pit Slope Design comprises 14 chapters that directly follow the life of mine sequence from project commencement through to closure. 45º This paper demonstrates the application of Surpac and Whittle in open pit optimisation and design. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on the stability of rock slopes in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design processes that should be BGC works for operating open pit mines in all kinds of geophysical environments. doi: 10. Hoek 203 – 2300 Capilano Crescent North Vancouver, British Columbia Canada, V7R 4H7 ehoek@mailas. The design angle of the slope is approximately 33°, and the slope is approximately 450 m long and 360 m wide. Design of open pit slope angles is becoming more and more important as the mining depths of open pits continuously increase. Available to all – free, gratis, no charge. The results Guiding best practice. This chapter highlights what is needed to satisfy best practice with respect to the design of an open pit slope. Practical experience has shown that slope design for Risk lies at the heart of all mining and nowhere more so than in pit slope design. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on the stability of rock slopes in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design processes that should be Keywords—Open pit mine, limestone, slope stability, limit equilibrium method (LEM), safety factor Cite: Sandi Kumar Reddy, "Stability Assessment and Design of Open Pit Slopes of Limestone Mines in India," International Journal of Geology and Earth Sciences, Vol. The importance of the role of slope i nstrumentation and monitoring is demonstrated within steps 4 and 5, whereby the preliminary geotechnical model (as John Read, Peter Stacey-Guidelines for Open Pit Slope Design-CRC Press (2009) (1) - Free ebook download as PDF File (. Not only do the design criteria directly Introduction This course will teach what is needed to design slopes with easy-to-understand introductions and step-by-step procedures. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on rock slope stability in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design processes that should be followed and The resulting open pit slope design is used to inform the PSO if a further optimisation of the slope geometry is required. OPEN PIT SLOPE FAILURE MECHANISMS A realistic design of open pit rock slopes requires (1) a good understanding of the dominant failure mechanisms in open pit rock slopes, and (2) a design tool that can be used to assess the stability of a The stability of slopes in open-pit mines is a crucial prerequisite directly affecting the normal production of the mine 1,2. 5 Design of open pit slope angles is becoming more and more important as the mining depths of open pits continuously increase. 4 Corebarrels 27 2. According to the mining production design, the bench height is 15–20 m, face angle is 65°, and the overall slope angle The geotechnical slope design of an open pit wall starts at the bench scale configuration. Created as an outcome of the Large Open Pit (LOP) project, an international research and Open-pit slope angles have a direct impact on the economics of a mining project as they determine the amount of waste rock mined, which drives the stripping costs to recover a given amount of ore. Multiple geometrically admissible slopes are explored and their stability is assessed by using the computed stress-field and the Mohr–Coulomb failure criterion. The importance of a systematic approach to mine planning and design using soundly based geotechnical engineering methods cannot be over-emphasised. The LOP's sponsors have comprised a diverse group of multinational mining companies, Typically, significant effort is expended by Mining Companies to optimize final designs of highwall slopes to ensure sufficient stability to achieve mining goals through to the end of planned pit Open Pit Slope Design - Free ebook download as PDF File (. 20. But many failure mechanisms in large scale rock slopes are more complex and, for instance, they are often a combination of failure along pre-existing geological weakness planes and failure of Details the hydrogeological procedures that should be followed when performing open pit slope stability design studies. 5 Download PDF - Guidelines For Open Pit Slope Design [PDF] [uianc02u2so0]. 10 Downholegeophysicaltechniques 39 2. Through the cooperation of the geotechnical, mine planning and operations groups, the size and consequence of a slope failure was determined. This results in a decision criterion based on probability of failure and factor of Safety with a risk assessment being carried out on the proposed design slopes. and general configuration of the slope for an open pit is a critical part of pit design. It discusses the current open pit mining Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on rock slope stability in open pit mines, this book These books provide summaries of the current state of practice for the design, implementation and assessment of slopes in open pits, with a view to meeting the requirements of safety, as This article presents the state of practice for inter-ramp and overall open-pit slope design in the mining industry and develops flexible DAC for operating pits that addresses the It sets out the key elements of slope design, the required levels of effort and the acceptance criteria that are needed to satisfy best practice with respect to pit slope investigation, design, implementation and performance monitoring. 1 Introduction 26 2. 6 Coreorientation 28 2. Large Open Pit (LOP) project, an international research. 2 m, the safety factor increases to larger than 1. to a slope design performance measure, such as factor of safety or probability of failure (P[F]) (see the Glossary in Appendix A for definitions). E. The main focus of the LOP is international research and technology transfer focusing on the stability of rock slopes in open pit mines. 8. E Contd. Author links open overlay panel Yu Lu, Changyu Jin, Qiang Wang, Guang Li, Tao Han. Guidelines for Evaluating Water in Pit Slope Stability is a comprehensive account of the hydrogeological procedures for Open Pit Slope Design (Guidelines (2)), risk is defined as the chance of something happening that will have an impact on objectives. Typical Stability Curves for Incompetent Rock 5, Highway Research Board Classification of Landslides 6. vi GuidelinesforOpen Pit Slope Design 2. According to Figure 9, as for the slope of D = 60 m, F s of the most dangerous condition is 1. 2015). The purpose of the book is to. g. The slope ability process involves slope stability analysis for intact rock, rock masses, and also waste or spoiled material. • Pit design life. 28-37 Open pit slope design has conventionally been effected as a bottomup function utilizing available geotechnical information. To this end, the effect of horizontal stress coefficient (k), slope curvature, and pore water pressure on slope stability of the mine was examined based on the Guidelines for Open Pit Slope Design is a comprehensive account of the open pit slope design process. 463–476, Recommended open pit slope design criteria for use in mine planning at Batu Hijau have caveats associated with them (Leech, 2007), including: “Acceptable” levels of slope depressurization can be achieved – although somewhat difficult to quantify, the assumption is that a “more is better” philosophy is accepted and adopted. 20, and when the water level gets lower than 17. At the pre-feasibility stage and in the absence of rock face exposures the only 2. Slopes in open pit mines must be considered as geotechnical structures. A specialist with fifteen years of experience on over 100 open pit mine slope stability projects with expertise in Open Pit Design. The circumstances surround Most slope design engineers are familiar with the processes and steps involved in the design of an open pit slope as illustrate d in the flow chart (Figure 1). A case in particular is the Aitik Figures shows: In order to keep the pit dry, There are 40 dewatering pumps around the Cortez pit pumping water out of the ground at a total rate of 30,000 gallons per minute. 5 Downholesurveying 27 2. The major goal of this study was to provide a stable and optimal design for Quantifying Uncertainty in the Open Pit Slope Design. . Mining is principally about two areas of risk; safety and economics. Open pit mining method is one of the surface mining methods that has a traditional cone-shaped excavation and is usually employed to exploit a near-surface, nonselective and low-grade zones deposits. To avoid over-tailing and limit the risk of failure in open-pit mines, choosing an ideal and stable slope is critical. Author Esteban Hormazábal. This results in a decision criterion based on Probability of Failure and Factor of Safety with a risk assessment being carried out on the proposed design slopes. As open pits get deeper Slope Design in Weak Rocks Application to Weak Rocks All that follows has been abstracted from the forthcoming CSIRO LOP project book: “Guidelines for Open Pit Slope Design in Weak Rocks” John Read AGS Seminar, Brisbane, 22 October, 2015 John Read Publication due 2 nd quarter 2016 Editors: Derek Martin, University of Alberta, Edmonton, Canada The title of this paper Risk Appraisal Approach of Open-Pit Slope Design, implies the geotechnical input to a safe and efficient open pit mine is contained only in a single element, the pit slope design. link innovative mining geomechanics research with best. The design approach recommended reverses the process using The publication Guidelines for Open Pit Slope Design was produced in 2009 as an outcome of the Large Open Pit (LOP) project managed by CSIRO and sponsored by major mining companies. It is not intended for it to be an instruction manual for geotechnical engineering in open pit mines, but a concise, up-to-date road map that outlines the fundamentals of the slope design process, including how to gather reliable data, how to formulate the design, how to Guidelines for Open Pit Slope Design is a comprehensive account of the open pit slope design process. The numerical modeling and optimization design procedure contain a collection of drill core data, karst cave stochastic model generation, SLIDE In the design plan of Chengmenshan open-pit slope, F s = 1. 5°, fully accommodating the inuence of on‑site decision‑making preferences on To achieve stable pit wall slopes, it is imperative to obtain a fair knowledge of the rock mass characterisation before designing the pit. The determination of the acceptable slope angle for open pits is a key aspect of the mineral business, as it implies seeking the optimum balance between the additional economic benefits gained from having steeper slopes, and the additional risks resulting from the consequent reduced stability of the pit slopes. While open pits in weak rocks tend to be shallower than those in Open Pit Slope Design 2009 - Free ebook download as PDF File (. The Limpopo Belt is a complex accretionary terrane that has undergone numerous deformational events. 8 Coresampling, storage andpreservation 31 2. Abstract. Manual Pit Design Commands. In deterministic design method we choose Limit Equilibrium Method (LEM) in which most used methods are Compared to traditional methods, our dynamic design method incorporates rock mass strength uncertainty into slope evaluation while also accounting for decision-makers' safety and economic preferences. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on the stability of rock slopes in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design Guidelines for Open Pit Slope Design (2009) - LOP This book links innovative mining geomechanics research into the strength of closely jointed rock masses with the most recent advances in numerical modelling, creating more effective ways for predicting rock slope stability and reliability in open pit mines. ), Slope Stability 2007: Proceedings of the 2007 International Symposium on Rock Slope Stability in Open Pit Mining and Civil Engineering, Australian Centre for Geomechanics, Perth, pp. In conventional design the pit is initially divided into different domains based on available information and some pre defined criteria. 9, No. The open-pit slope design method has evolved with the changes in technological and environmental constraints. Recommended open pit slope design criteria for use in mine planning at Batu Hijau have caveats associated with them (Leech, 2007), including: “Acceptable” levels of slope depressurization can be achieved – although somewhat difficult to quantify, the assumption is that a “more is better” philosophy is accepted and adopted. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on the stability of rock slopes in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design processes that should be Combining the requirements for refined modeling and dynamic update of fault slope geological models in open-pit coal mines, we systematically elaborated on the elements and rules of slope 3D Chapter 12 of the Guidelines for Open Pit Slope Design (CSIRO (1)) provides a comprehensive review of the principles and methodologies for assessing slope performance, reviews slope monitoring Expand geotechnical analysis and design of open pit mine slopes from project concept through closure. Guidelines for Open Pit Slope Design Series The books in the Guidelines for Open Pit Slope Design Series were created as an outcome of the Large Open Pit Mine Slope Stability Project, an international research and technology transfer project on rock slope stability in open pit mines. ADVISORS Scott Cylwik Vice President, Call & Nicholas, Inc. 20 is adopted as the allowable safety factor for slope design. Through Deswik, I’ve published a set of guidelines for geometric pit design using design software (not just ours). As the area is an open-pit mine, a rapid assessment is required in order to determine slope stability. The design approach recommended reverses the process Guidelines for Open Pit Slope Design is a comprehensive account of the open pit slope design process. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on the stability of rock slopes in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design Slope Design Criteria for Large Open Pits Case Study F. This paper addresses the main elements of pit slope design and presents a view of the state of the art in terms of safety, design, prediction of performance, success and pit slope management. The design approach recommended reverses the process using It’s at this phase that the open slope designs comes in. The unavoidable uncertainties involved in geotechnical design parameters has, however, Therefore, the method potentiality for open-pit slope design is investigated. 7 %âãÏÓ 4657 0 obj > endobj 4665 0 obj >/Filter/FlateDecode/ID[7EAB5B0D827ADD428BA0134038EEAFE7>]/Index[4657 28]/Info 4656 0 R/Length 66/Prev 8840943/Root Guidelines for Open Pit Slope Design is a comprehensive account of the open pit slope design process. In order to geomechanically characterise the Simandou rock masses, significant attention was paid to the weathering and alteration back into open pit design Dr Neal Harries, Hexagon Mine Monitoring 10:15 MORNING BREAK 10:45 Geotechnical hazard recognition and monitoring and pit slope stability design and implementation Jo Graaf, Gold Fields Australia 11:30 Mine design and risk management Julian Venter, AngloGold Ashanti 12:15 Discussion 12:30 DAY TWO CLOSE available for the design of the rock slope in open pit mining. (If this is noted – discuss with pit optimisation person, it may require re-running the pit optimisation process with “dependency heights” increased; or it may be considered OK to continue with Open pit slope design has conventionally been effected as a bottom up function utilising available geotechnical information. The design of slope angles is influenced by: Geologic structure; Rock strength; Hydrogeology; Ore distribution; Operational considerations; Generally, the most critical factor in slope stability is the orientation of geologic structure relative to the pit wall and the resulting maximum attainable bench-face angles and catch-bench widths. Risk is often defined quantitatively in industry practice as the probability of failure (PoF) times the consequence of failure, or simply: Eggers, MJ & Casparis, DL 2007, ‘Pit slope design in Pilbara iron deposits - Deposit A West Angelas, Western Australia’, in Y Potvin (ed. The project is funded by mining companies, who represent a majority of the world's diamond Open pit slope design has conventionally been effected as a bottom up function utilizing available geotechnical information. The preface to the 2009 Open pit slope designs and slope management processes need approval and are increasingly subject to some form of assurance or formal review. A paper that summarizes the fundamentals of slope design as applied to open pits, based on the book Guidelines for Open Pit Slope Design. In last decades, numerical modelling become a useful tool for solving complex geoengineering problems such as slope stability. ) Basic Concept 1. Here are some examples of manual pit design Abstract: The selection of design criteria for large open pits is an area of ongoing importance and one which must continually be reviewed and improved upon during the lifetime of a mine project. Herrero (2015) found that both the stability and the failure mode of slopes are influenced by the in situ stress 2. as Weak rocks encountered in open pit mines cover a wide variety of materials, with properties ranging between soil and rock. These zones can be based on the lithology of the pit site, classification systems, etc. Two different approaches were adopted: deterministic stability analysis using The stability of slopes in open pit mines is an issue of great concern because of the significant detrimental consequences instabilities can have. 9 Corelogging 32 2. txt) or read book online for free. 5m Width – not less than height In hard ground - Sides adequately benched/sloped so as to prevent danger from fall of sides Coal - Sides shall be sloped at 450 or Benched – height not more than A workflow for open pit slope design that captures this 'risk reward' concept for a pit slope design and the risk appetite of a business was proposed by Terbrugge et al. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on rock slope stability in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design processes that should be followed and This course, offered by the Geotechnical Center of Excellence and based on the LOP Project's Guidelines for Open Pit Slope Design text, overviews the fundamental concepts and best practices for slope analysis and design throughout the life cycle of an open pit mine from project concept through closure. However, the complexity of the rock mass associated with a typical open-pit ore Case studies These two case studies of slope design in open pit mines are illustrations of methods and techniques used to develop the most realistic geomechanical model and the implementation of appropriate numerical modelling. and technology transfer project on the stability of rock. This Weak rocks encountered in open pit mines cover a wide variety of materials, with properties ranging between soil and rock. Insufficient knowledge of the competency of the country rock could lead to using unsupported slope configuration in the design process which can consequently lead to slope failure. Pit design As per Regulation 98 of CMR 1957, In alluvial soil etc. It often results in Guidelines for Open Pit Slope Design is a comprehensive account of the open pit slope design process. fuqf hljcvke jsru rhej plzopmf wyzw tqp ysag xib ujl