Background

open pit slope depressurization

(PDF) Ground Characterization and Design of a Drainage ...

A lapse of slope depressurization ... Ok Tedi Copper-Gold mine is a large open pit mine in the Western Province of Papua New Guinea that typically …

DESIGN OF OPEN PIT SLOPES - cnitucson.com

DESIGN OF OPEN PIT SLOPES by Richard D. Call Department of Mining and Geological Engineering University of Arizona Tucson, Arizona ABSTRACT Determining the maximum angle to which a pit slope can be mined requires information on the geometry and strength of the geologic structures, the magnitude and distribution of stresses, and the ground …

Guidelines for Open Pit Slope Design | CSIRO Publishing

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 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 …

Open Pit Slope Depressurization using Horizontal Drains ...

Open Pit Slope Depressurization using Horizontal Drains – a Case Study Simon Leech a), Matthew McGann b) a) PT Newmont Nusa Tenggara, Geotechnical and Hydrogeological Dept., Jl. Sriwijaya # 258 Mataram 83126, Indonesia email: [email protected] tel +62 8175749564

Open Pit Slope Depressurization Using Horizontal Drains ...

Open Pit Slope Depressurization using Horizontal Drains Simon Leech a), Matthew McGann b) a Case Study. a) PT Newmont Nusa Tenggara, Geotechnical and Hydrogeological Dept., Jl. Sr iwijaya # 258 Mataram 83126, Indonesia email: [email protected] tel +62 81 75749564 b) PT Newmont Nusa Tenggara, Mine Water Management Dept., Jl. Sriwijaya ...

Guidelines For Open Pit Slope Design

Open Pit Slope Design, which was published in 2009 and dealt primarily with strong rocks. Both books were commissioned under the Large Open Pit (LOP) project, which is sponsored by major mining companies. These books provide summaries of the current state of practice for the design,

Introduction to Open Pit Slope Stability Course ...

The objectives of the course are to: Provide a holistic big picture overview of both the geotechnical design and operational management processes. Take delegates sequentially through the various stages of the slope stability design process. Cover operational issues related to managing open pit operations from a geotechnical perspective.

Open Pit Slope Depressurization using Horizontal Drains ...

Open Pit Slope Depressurization using Horizontal Drains – a Case Study . By Simon Leech A and Matthew Mcgann B. Abstract. The establishment of appropriate open pit slope design criteria evolves throughout the life of a mine, and is based primarily on an ever increasing understanding of the rockmass conditions, including groundwater and ...

GEOTECHNICAL CONSIDERATIONS IN OPEN PIT MINES

open pit excavations will endeavour to prevent hazardous and unexpected failures of the rock mass* during the operating life* of the open pit. The importance of a systematic approach to mine planning and design using soundly based geotechnical engineering methods cannot be over-emphasised. Open pit mines can

Feasibility Pit Slope Design

Pit water management for the open pit development will include surface water interception and diversion, slope depressurization and a pit dewatering system. A detailed pit hydrogeological study is scheduled to be conducted by others. The design basis for the recommended pit slope angles requires the implementation of careful

Paper: Fact and Fiction About Pit Slope Depressurization

In recent years the effects of water pressures on pit slope stability have increasingly concerned open pit designers and geotechnical engineers. The concerns have grown as deeper open pits are considered and optimization (steepening) of the wall angle becomes a critical aspect.

(PDF) Ground Characterization and Design of a Drainage ...

A lapse of slope depressurization ... Ok Tedi Copper-Gold mine is a large open pit mine in the Western Province of Papua New Guinea that typically receives in excess of 10,000mm annual rainfall ...

ANALYSIS OF A SLOPE FAILURE IN AN OPEN PIT MINE ...

TSLOPE allows the user to set up a number of slope cases based on the slope model and material parameters (density, shear strength). The slope cases may be either 3D, or 2D. For the open pit slope, we created a 3D slope case using the composite topographic surface, and the composite failure surface as discussed in section 4.

KSM 2012 PFSU Open Pit Design Review - FINAL 20120612

KSM Project 2012 Pre-Feasibility Study Update - Open Pit Design Review Project No: 0683-013-30 KSM 2012 PFSU Open Pit Design Review - FINAL 20120612.docx Page 4 BGC ENGINEERING INC. The overall FOS for Sections B to G ranges from 1.3 to 3.1, assuming the water table is set back 50 m from the pit face.

Cost-Benefit Design of Open Pit Slopes

The objective of an open pit mine plan is to obtain the ... general, increasing the slope angle decreases the stripping and/or increases the recoverable ore (Figure 1). However, as the slope angle increases there is an increase in the number and size of slope failures, hence an increase in the cost of ...

Large-Scale Slope Depressurization Program - Golder

A multi-year project to design, construct and operate/maintain a large-scale slope depressurization program at an open pit mine. Depressurize a clay layer located within the pit wall stratigraphy, thereby allowing the excavation of the overburden slopes to a stable geometry. The project will facilitate a considerable expansion of the mine, and ...

Engineering geology consideration for low-wall stability ...

Depressurization is indispensable in pit optimization and pit design (Waterhouse et al. 2008). Numerical modelling in slope stability analysis for optimizing mine slope is more convincing in the result of slope stability analysis (Suratha 2007).

Slope Design and Implementation in Open Pit Mines ...

This article reminds the principles of slope design in open pit mines, and presents techniques and tools available to address the successive stages of slope design. Their practical implementation is then illustrated by two case studies of open pit mines. * Corresponding author. Tel.: +33 1-6469-4813; fax: +33 1-6469-4711.

CiteSeerX — Open Pit Slope Depressurization using ...

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The establishment of appropriate open pit slope design criteria evolves throughout the life of a mine, and is based primarily on an ever increasing understanding of the rockmass conditions, including groundwater and associated groundwater pressures that may be acting within the slopes.

Fundamentals of slope design Keynote address at Slope ...

The shear strength reduction method is now widely used in open pit slope stability studies because it includes all the benefits of limit equilibrium analyses and it allows the user to study slope displacements that are critical in the evaluation of open pit stability. An example involving the use of this method will be discussed later.

2020 International Symposium on Slope Stability in Open ...

Open Pit Slope Depressurization using. analysis of a slope failure in an open pit mine using tslope. The Influence of Earthquakes on Open-Pit Slope Stability open-pit slope stability. Figure 1. shows the. Regulation of open pit slope stability in Russia for open pit slope design (2010) by John Read and Peter.

Development of drain hole design optimisation: a ...

Kong X, Zhu G, Zheng Q, Hu P, Wang R, Hao Z (2008) Groundwater drainage technology based on hydraulic capture principle for open pit slope. J Nanjing Univ (Nat Sci) 44:660–665 (in Chinese) Google Scholar Leech S, McGann M (2007) Open pit slope depressurization using horizontal drains—a case study Newmont.

DETERMINATION OF OPTIMUM OVERALL SLOPE ANGLE …

slope stability evaluation is important to keep the balance between safety of slopes and economic efficiency. In this study, optimum overall slope angle for open pit mines in Bizmişen region by conducting slope stability analyses is aimed to be determined. Additionally, the study presents the slope design chart constituted for iron ore mines

SEISMOLOGY AND SLOPE STABILITY IN OPEN PIT MINES …

routine micro-seismic monitoring may be possible in most open pit slopes. Previously, a good correlation has been observed at the Navachab and Union Reefs open pit mines between slope surface movements and the seismic event data recorded within the slope (Lynch et al, 2005). Knowledge of the fracture locations and sizes is converted to inferred

Download [PDF] Guidelines For Open Pit Slope Design …

Guidelinesfor Evaluating Water in Pit Slope Stability (the 'Water Book') is 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. Author: John Read. Publisher: CSIRO PUBLISHING. ISBN: 9780643108363. Category: Nature. Page: 616. View: 944. Read ...

(PDF) Optimization of Open-Pit Mine Depressurization ...

Optimization of Open-Pit Mine Depressurization System Using Simulated Annealing Technique. July 2007. Journal of Hydraulic Engineering 133 (7) DOI: 10.1061/ (ASCE)0733-9429 (2007)133:7 (825 ...

Pit Slope Design Process - Home - LOP

As part of the response to the lack of research into the slope design over the previous 15 to 20 years, the Large Open Pit (LOP) project was initiated in 2004 with two basic streams, namely: Compilation of the Guidelines for Open Pit Design book (1) providing guidelines for the design of slopes in open pit mines.

Paper: Development of a mine dewatering and pit slope ...

Dowling, J, Beale, G & Reidel 2011, 'A Framework for Mine Dewatering and Pit Slope Depressurization Design and Implementation', in E Eberhardt & D Stead (eds), Proceedings of the 2011 International Symposium on Rock Slope Stability in Open Pit Mining and Civil Engineering, Canadian Rock Mechanics Association, Vancouver.

Horizontal Drainhole Drilling (HDH Drilling) | Open Pit ...

HDH / Horizontal Long Hole Drilling / Horizontal Pit Drains : HDH Drilling is drilling technique that allows for the reduction of pressure on a slope wall. Typically, Horizontal & Vertical drilling processes are used in open pit mining dewatering.

STABILITY ANALYSIS OF OPEN PIT SLOPE BY FINITE …

Open pit slope stability analysis has been performed to assess the slope deformation, state of stresses at critically instable failure zones, different failure modes and safe & functional design of excavated slopes using the numerical modeling technique, finite difference method. ...