Slope Stability in Open Pit Mines in Clayey Rock Mass

2020 ◽  
Vol 56 (2) ◽  
pp. 196-202
Author(s):  
N. F. Nizametdinov ◽  
R. F. Nizametdinova ◽  
A. A. Nagibin ◽  
A. R. Estaeva
Keyword(s):  
Rock Mass ◽  
Slope Stability ◽  
Clayey Rock ◽  
Open Pit ◽  
Open Pit Mines

Mining technologies at Polyus Krasnoyarsk

2020 ◽  
pp. 30-33
Author(s):  
L. F. Skorik ◽  
◽  
V. A. Karpov ◽  
I. N. Timofeev ◽  
A. I. Ptashnik ◽  
...  
Keyword(s):  
Rock Mass ◽  
Slope Stability ◽  
Numerical Models ◽  
Stability Control ◽  
High Rate ◽  
Mine Safety ◽  
Open Pit ◽  
Wave Impact ◽  
Open Pit Mines ◽  
Research Activities

The article discusses mining efficiency and the related research activities at Polyus Krasnoyarsk. Olimpiada and Blagodat gold fields feature difficult geological, hydrological and geotechnical conditions. Sustainable mining at high rate and high output requires permanent scientific, engineering and design support and supervision. In this regard, the integrated and fruitful efforts are persistently undertaken to improve performance of drilling and blasting, including minimization of seismic and shock wave impact on rock mass beyond the perimeter blast holes, optimization of size grade composition of blasted rock pile, and determination of displacement vector of rocks in muck pile using appropriate instrumentation and software. Furthermore, modification and upgrading of drainage systems and slope stability control is always in process in Olimpiada open pit mines. Polyus Krasnoyarsk engages itself with refining of information on geomechanics and hydrogeology of gold ore bodies. The purpose of these activities is to determine and amend the parameters of ore body occurrence, morphology of faulting, rock contacts and folding structures in rock mass, physical and mechanical properties of rocks, as well as hydrogeological conditions, with updating of the numerical models. Such information at hand ensures mine safety and enables safe and economically efficient decision-making on spoil bank design to provide the required slope stability in open pit mines.

scholarly journals Inter-ramp and bench design of open-pit mines: the Portage pit case study

2011 ◽  
Vol 48 (11) ◽  
pp. 1601-1615 ◽  
Author(s):  
Martin Grenon ◽  
Amélie-Julie Laflamme
Keyword(s):  
Slope Stability ◽  
Software Tool ◽  
Open Pit ◽  
Mine Design ◽  
Robust Algorithms ◽  
Structural Domains ◽  
Open Pit Mines ◽  
Susceptibility Maps ◽  
Database Structure

Using a case study, this paper presents an integrated methodology for assessing structural slope stability at the inter-ramp and bench levels. Robust algorithms have been developed and implemented to compute, at inter-ramp and bench levels, slope orientations and slope stability using input data compatible with a commercially available mine-design software tool database structure. Multi-criteria stability analyses were performed based on various design criteria. Susceptibility maps were produced enabling the identification of zones of concern in the designed pit. The obtained results suggest that inter-ramp angles do not present instability concerns over the entire pit surface. At bench levels, potential instability zones were identified within two structural domains totalling 6% of the total pit surface.

scholarly journals Two-Dimensional Modeling of the Influence of Underground Mining Direction on Slope Stability in Coordinated Open-Pit and Underground Mining

2021 ◽  
Author(s):  
Bowen Liu ◽  
Zhenwei Wang ◽  
Xinpin Ding ◽  
Zhitao Wang ◽  
Bin Li
Keyword(s):  
Rock Mass ◽  
Slope Stability ◽  
Underground Mining ◽  
Mining Area ◽  
Two Dimensions ◽  
Open Pit ◽  
Engineering Practice ◽  
Inverse Slope ◽  
Coal Wall ◽  
Mining Face

Abstract Under a background of coordinated open-pit and underground mining engineering practice in the Pingshuo mining area, a combination of numerical simulations and similar-model experiments was used to study the influence of the underground mining direction on slope deformation in two dimensions. The results show that the disturbance caused by inverse-slope mining is more obvious than that caused by along-slope mining. Underground mining presents an asymmetric influence on the open-pit slope; the slope rock mass on the open-off cut side is disturbed more than that on the coal-wall side. Compared with the slope in front of the advancing direction of the underground mining face, the degree of rock-mass damage and stress concentration of the slope of the open-off cut side are more serious. As such, in coordinated open-pit and underground mining practice, an along-slope mining direction is recommended to reduce adverse effects on slope stability and improve the recovery rate of coal resources.

scholarly journals Study on failure law of rock mass and slope stability by open-pit combined mining

2021 ◽  
Vol 248 ◽  
pp. 03013
Author(s):  
Feng Shaojie ◽  
Gao Chen ◽  
Liu Wenbo
Keyword(s):  
Field Theory ◽  
Rock Mass ◽  
Slope Stability ◽  
Simulation Method ◽  
Geological Structure ◽  
Open Pit ◽  
Copper Mining ◽  
Failure Properties ◽  
Mining Methods ◽  
Reinforcement Measures

With the continuous downward mining, more and more attention has been paid to the problem of slope stability under open-pit combined mining. Taking Zijinshan gold and copper mining as an example, the failure properties of overlying rock mass and slope stability under open-pit combined mining under different mining methods are studied by numerical simulation method, and the failure law of overlying rock mass is proposed. Combined with the geological structure distribution of 5-5 section and the influence of different mining stages, the slope stability is evaluated by slip field theory. Relevant reinforcement measures are proposed.

Guidelines for Open Pit Slope Design

2009 ◽  
Author(s):  
John Read ◽  
Peter Stacey
Keyword(s):  
Slope Stability ◽  
Best Practice ◽  
Rock Slope ◽  
Rock Slope Stability ◽  
Open Pit ◽  
Financial Return ◽  
Open Pit Mines ◽  
Management Procedures ◽  
And Performance ◽  
Slope Design

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 the tools that are available to aid slope design practitioners. 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. 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. Guidelines for Open Pit Slope Design comprises 14 chapters that directly follow the life of mine sequence from project commencement through to closure. It includes: information on gathering all of the field data that is required to create a 3D model of the geotechnical conditions at a mine site; how data is collated and used to design the walls of the open pit; how the design is implemented; up-to-date procedures for wall control and performance assessment, including limits blasting, scaling, slope support and slope monitoring; and how formal risk management procedures can be applied to each stage of the process. This book will assist in meeting stakeholder requirements for pit slopes that are stable, in regards to safety, ore recovery and financial return, for the required life of the mine.

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