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Stability analysis of the sliding process of the west slope in Buzhaoba Open-Pit Mine

International Journal of Mining Science and Technology 2016年第5期26卷 869-875页

作者： Ning Fang Ji Changsheng garmondyu e.crusoe jr. School of Art and Design School of Mines China University of Mining & Technology

To study the stability of the west slope in Buzhaoba Open-Pit Mine and determine the aging stability coefficient during slide mass development, the deformation band of the west slope and the slide mass structure of the 34,600 profile are obtained on the basis of hydrology, geology, and monitoring *** residual thrust method is utilized to calculate the stability coefficients, which are 1.225 and 1.00 under sound and transfixion conditions, respectively. According to the rock damage and fragmentation and the principle of mechanical parameter degradation, the mechanical models of the slide mass development of the hard and soft rock slopes are established. An integrated model for calculating the slope stability coefficient is built considering water, vibration, and other external factors that pertain to the structural plane damage mechanism and the generating mechanism of the sliding mass. The change curve of the stability coefficient in the slide mass development is obtained from the relevant analyses,and afterwards, the stability control measures are proposed. The analysis results indicate that in the cracking stage of the hard rock, the slope stability coefficient decreases linearly with the increase in the length Lbof the hard rock crack zone. The linear slope is positively correlated to rock cohesion c. In the transfixion stage of the soft rock, the decrease speed of the stability coefficient is positively correlated to the residual strength of the soft rock. When the slope is stable, the stability coefficient is in a quadratic-linear relationship with the decreased height Dh of the side slope and in a linear relationship with anchoring force P.

关键词： Open-pit mine Side slope Sliding process Aging stability Crack zone

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Mechanical properties of material in a mine dump at the Shengli#1 Surface Coal Mine,China

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International Journal of Mining Science and Technology 2017年第3期27卷 545-550页

作者： Gao Shiyou Zhou Wei Shi Xuyang Cai Qingxiang crusoe garmondyu e.jr. Jisen Shu Huang Yuejun School of Mines China University of Mining&TechnologyXuzhou 221116China Shenhua Beidian Shengli energy Co.Ltd. Xilinhaote 026000China

ln-situ experiments were conducted to investigate the mechanical properties of the soil-rock mixture in the internal dump of the Shengli #1 Surface Coal Mine, China. Based on the experimental results, this study used comparative analysis and found that the shear strength of the soil-rock mixture in the dump was greater than the residual shear strength of the original rock. The results showed that the material presented in the dump as large blocks was the main factor affecting the strength of the soil-rock mixture, Numerical simulation was carried out for the analyses of three factors： different combinations of shear failure, rolling failure along with different large-block radius ratios, and mixture densities. The results illustrated that the cohesion and angle of internal friction of the soil-rock mixture are 12 kPa and 32.26°. However, in some cases the bench angle in the dump was controlled by a coupling relationship of rocks in the material. Finally, the stability of a soil slope showed a linear relationship with the large-block radius ratio and the bulk density.

关键词： Surface coal mine Soil-rock mixture Residual strength In-situ experiment Mechanical model

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