and also limitations through case studies of slope design in open pit mines. Keywords: slope stability, slope design, engineering geology, fault, open pit mines, SOMAIR uranium mine, OCP phosphate mine 1. INTRODUCTION Slopes of mines and quarries, some …
May 04, 2021· Huang took the open-pit mining slope of a mine in Jiangxi province as the research object, and the failure mode of the slope is determined as follows: slippage along the fault plane-rock plate, bending-tracing the schistosity plane of phyllite, and eventually the failure occurs along the foot of the slope, or "collapse" failure occurs .
Probabilistic slope stability analysis of open pit mine using Slide 6.0 . G. ... Failure for the slope is equal to the Probability of Failure of the Deterministic Global Minimum slip surface.
Mar 25, 2016· Even relatively shallow strip mines and quarries can experience devastating consequences from slope failure. Open-pit mines are deeper than ever before, and because rock mass strength at these large scales is difficult to evaluate, massive slope failure can occur with little warning.
May 21, 2019· One of the most important issues of slope designing in most open pit mines is determining the failure mechanism. The rock mass of each slope …
Mar 06, 2019· Mining under an open pit slope results in the collapse and slide of the slope. In this paper, a combination of methods including Google Earth and field investigations is applied to investigate the process of eastern slope failure induced by underground mining in the Yanqianshan Iron Mine over five years. According to the observed ground deformation features, the geomorphic zone of the …
In 1996 a slope failure occurred at the Round Hill open pit mine, operated by Macraes Mining Company Ltd. The failure as shown in Figure 1, involved three benches at an intermediate slope that was being pushed back towards the final high wall location. Figure 1. Photograph of pit area involved with slope failure. The slope failure was well ...
Types of slope/ground failure When mine/quarry faces are exposed, relaxation of the rock occurs which may lead to loose material falling or rolling from the face. The likelihood of rockfalls and slope/batter instability increases when there is weak rock, bedding, joints, structures, blast damage, vehicle vibrations,
Consequences of an open pit slope failure can have significant safety and/or economic impacts, and hence the slope designs can form a significant part of the risk assessment for an open pit mine. This document presents an overview of risk management applied to open pit mining operations, with particular focus on
Mar 12, 2015· Slope monitoring forms an integral part of slope management on open pit mines. It provides information for detecting potentially unstable ground, assessing the performance of slope design which involves identifying any slope instability, and/or failure mechanisms that develop. This article details how the SiteMonitor system has been used as part of the slope monitoring […]
2. Open Pit Slopes — An Introduction 2.1 Slope Stability 2.2 Types of Slope Failure 2.2.1 Plane Failure 2.2.2 Wedge Failure 2.2.3 Circular Failure 2.2.4 Two Block Failure 2.2.5 Toppling Failure 2.3 Factors To Be Considered In Assessment Of Stability 2.3.1 Ground Investigation 2.3.2 Most Critical Failure Surface 2.3.3 Tension Cracks 5 5 11 11 14
For open pit mines, FoS in the range of 1.2 to 1.4 is extensively adopted (Duncan & Christopher, 2005). Slope of open-pit mines fail when its material shear strength on the sliding surface is insufficient to resist the actual shear stresses (Soren, Budi, & Sen, 2014). FoS values are by far the most understandable representation of the stability ...
The objective of an open pit mine plan is to obtain the maximum ore with the minimum of overburden stripping up to the limit where the incremental stripping cost equals the ... cost of a slope failure is a combination of various factors, each dependent on the type and location of the failure. Failure costs include cleaning up the failure ...
Excavations cover a broad range of geotechnical engineering from building construction to open pit mining and can be the basis for a wide range of analyses. Common to all issues in this category are the release of insitu stresses when the soil or rock is unloaded. ... In an advanced analysis, a slope failure in a pit can be accounted for as a ...
started in 2002 and the pit was designed to be mined in 5 mining phases with a Stripping Ratios of 7,9,12,16, & 15 for phases 1 to 5 respectively. Figure 1: Showing the plan view of COP FD mine design Figure 2: Showing the cross section A-A view of COP FD The slope consists of eleven different geological units from Chingola Open Pit. The ...
zones, and the stress levels around the pit could lead to induced failure of the rock. It is New slope stability considerations for deep open pit mines by T.R. Stacey*, Y. Xianbin†, R. Armstrong*, and G.J. Keyter‡ Synopsis There has been disappointingly little development in the analysis of rock slopes in open pit mines over the past 30 years.
Slope collapse is a critical hazard in open-pit mines as it can be of any scale, small or large, and directly a˜ect people, equipment, and production processes (.˚ 1)˛erefore, analysis and ...
International Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering Ian de Bruyn _____ Page 558 height, bench face angle and berm width can be used in the slope design. All geometrical pit slope elements referred to here are illustrated in Figure 1. The bench height, bench face angle and berm width geometries must be ...
9th Asian Rock Mechanics Symposium ARMS9 18-20 October 2016, Bali, Indonesia Slope Failure Behaviour Analysis in Open Pit Coal Mining Rachmat Hamid Musaa* and Singgih Saptonob a GroundProbe Indonesia, Indonesia b Mining Engineering Department UPN Veteran Yogyakarta, Indonesia Jalan SWK No 4 Candongcatur Yogyakarta, Indonesia, 55283 a …
The Large Open Pit Mine Slope Stability Project addresses an industry wide need for improved knowledge of the mechanisms of rock slope failure. The project focuses on the relationships between rock mass strength and deformability. Innovative geomechanics research is examining potential new definitions of rock mass strength criteria, the effects ...
DOI: 10.1016/J.IJRMMS.2006.07.014 Corpus ID: 129168889. Forecasting potential rock slope failure in open pit mines using the inverse-velocity method @article{Rose2007ForecastingPR, title={Forecasting potential rock slope failure in open pit mines using the inverse-velocity method}, author={N. D. Rose and O. Hungr}, journal={International Journal of Rock Mechanics and Mining …
slope failure, open pit mining, time series analysis, autoregressive integrated moving average (ARIMA), regression. Introduction Slope stability is an important aspect in a broad range of areas, such as mining, geology, construction, and architecture. It is critical in open pit mines. Many factors such as geological structural properties,
Optimal System Design for Instrumented Slope Monitoring in Open Pit Mines Sanjive Narendranathan 1 and Hamid Nikraz 2 1 Engineer, Coffey Mining Pty Ltd 2 Professor of Civil Engineering, Curtin University of Technology Synopsis : The importance of slope mo nitoring, and its place in the design and operation of an open -pit mine are presented.
Forecasting potential rock slope failure in open pit mines using the Inverse-velocity method. International Journal on Rock Mechanics and Mining Science, pp. 308-320. Sullivan, T. D. 1993. Understanding pit slope movements. Proceedings of the Conference on Geotechnical Instrumentation and Monitoring in Open Pit and Underground Mining.
Jun 10, 2021· Current and previous owners of the Nchanga Open Pit (NOP) have experienced challenges of mining the pit to the planned pit bottom due to pit instability especially to the footwall as mining advances downwards. Minor and major rock slope failures mainly on the footwall have been recorded between 1970 and 2018 (Fig. 3 ).
Jul 29, 2019· References & Resources. Basson, I. et al. (2017) Structural analysis and 3D modelling of major mineralizing structures at the Phalaborwa copper deposit. Ore Geology Reviews, 83 (2017), 30–42. Brummer, R. K. et al., The Transition From Open Pit to Underground Mining: An Unusual Slope Failure Mechanism at Palabora. The South African Institute of Mining and Metallurgy International …
mizing the impact of progressive slope failure on mining. Regressive slope failures often occur as a result of rock mass yielding near the toe of the slope. In the United States, case histo ries of regressive slope failures in open-pit mining have been doc umented in the literature since the early 1950s (Bisbee, Arizona, and Butte, Montana).
Nov 01, 2019· From a mining perspective, most open pit lignite mines have sufficient operational flexibility to withstand considerable slope displacements, as long as these are effectively monitored and modeled, so that: (i) sliding mechanisms are well interpreted, (ii) predictions regarding their magnitude and kinetic behaviour can be made, and (iii ...