Stability Analysis of High Rock Slope at a Open Pit Mine and its Control Measure

2011 ◽  
Vol 261-263 ◽  
pp. 1549-1553 ◽  
Author(s):  
Ke Gang Li ◽  
Ke Peng Hou ◽  
Ze Yang
Keyword(s):  
Optimal Control ◽  
Slope Stability ◽  
Rock Slope ◽  
Control Measure ◽  
Open Pit Mine ◽  
Open Pit ◽  
Engineering Construction ◽  
Original State ◽  
Engineering Requirement ◽  
High Rock Slope

A lot of slopes will be formed in the process of engineering construction, and how to ensure the slope stability has become a very key field and common concern to geotechnical engineering. Taking the slope of a open pit mine as an example, the slope stability at original state is analyzed firstly, and then, the optimal control measure and the slope stability trend during the treatment are also researched. The results show that at the original state, the slope stability is worse, and a large contiguous plastic regions will occure on the slope. After comparing to some methods, local unloading is identified as the optimal control measure. When unloading works are carried out and finished, the slope will be in a steady state, and the slope safety factor will up to 1.46, it satisfy engineering requirement.

Footwall Rock Slope Stability Evaluations at Nchanga Open Pit Mine, Zambia

2021 ◽  
Author(s):  
Wenping Gong ◽  
Victor Mwango Bowa ◽  
Chao Zhao ◽  
Zhan Cheng ◽  
Liang Zhang
Keyword(s):  
Slope Stability ◽  
Rock Slope ◽  
Open Pit Mine ◽  
Rock Slope Stability ◽  
Open Pit

scholarly journals Study on the Influence of Rainfall Infiltration on the High rock Slope of Open-pit Mine Stability using a New Nonlinear Strength Reduction Method

2021 ◽  
Author(s):  
Tianbai Zhou ◽  
Lingfan Zhang ◽  
Jian Cheng ◽  
Jianming Wang ◽  
Xiaoyu Zhang ◽  
...  
Keyword(s):  
Rock Mass ◽  
Rock Slope ◽  
Reduction Method ◽  
Strength Reduction ◽  
Open Pit Mine ◽  
Open Pit ◽  
Strength Reduction Method ◽  
Rock Slopes ◽  
High Rock Slope ◽  
The Stability

Abstract Due to long-term mining, a series of high and steep rock slopes have been formed in the open-pit mine. For high rock slopes, rainfall infiltration is the main cause of landslide. Therefore, the stability analysis of high rock slope under rainfall has become a key issue in the open-pit mine engineering. In this work, aiming at the high stress condition of high rock slope, the instantaneous internal friction angle and instantaneous cohesion of rock mass under different stress states are deduced, and the a nonlinear strength reduction method for high rock slope is established according to the relationship between normal stress and shear stress of rock mass under the Hoke-Brown criterion. The numerical calculation results show that the factor of safety (FOS) for high rock slope calculated by the proposed method is more reasonable. Taking the southwest slope of Dagushan Iron Mine as the research background, the safety factors of high rock slope under different rainfall conditions are calculated by COMSOL Multiphysics. And the stability analysis of high rock slope in open-pit mine under rainfall are carried out.

Research on the Failure Mechanism of Bedding High Rock Slope at an Open-Pit Mine

2013 ◽  
Vol 671-674 ◽  
pp. 266-273
Author(s):  
Fei Zhang ◽  
Jing Cao ◽  
Hai Ming Liu
Keyword(s):  
Failure Mechanism ◽  
Rock Slope ◽  
Deformation Characteristic ◽  
Critical Length ◽  
Open Pit Mine ◽  
Open Pit ◽  
Elastic Plane ◽  
Deformation Model ◽  
Seismic Force ◽  
High Rock Slope

The bedding high rock slope is most likely to failure in the rock slopes. It is the sliding and bending deformation model (buckling failure) according to deformation characteristic of the north wing slope at the open-pit mine. Considering the influence of rocky self-weight, seismic force and groundwater, the failure mechanism of bedding high rock slope by energy method is researched on the basis of stability theory for elastic plane. And the critical length is obtained. Finally, the influences of model geometry on the critical length, such as the rock stratum dip angle, thickness and width length ratio, is analyzed.

Assessment of the rock slope stability of Fushun West Open-pit Mine

2021 ◽  
Vol 14 (15) ◽  
Author(s):  
Fei Zhang ◽  
Tianhong Yang ◽  
Lianchong Li ◽  
Jianqing Bu ◽  
Tianliang Wang ◽  
...  
Keyword(s):  
Slope Stability ◽  
Rock Slope ◽  
Open Pit Mine ◽  
Rock Slope Stability ◽  
Open Pit
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