Stability analysis of new safety cleaning bank in steep slope mining^①

来源期刊：中南大学学报(英文版)2004年第4期

论文作者：吴爱祥 姜立春 鲍勇峰 李建锋

文章页码：423 - 428

Key words：steep slope mining; safety cleaning bank; retaining wall; stability; ANSYS

Abstract: Based on the study of the slope with gently granular structure in Xingqiao open mine, a new safety cleaning bank mode for steep slope mining was developed, including setting up dint cut, and forming natural retaining wall based on the character of gentle incline slope. It can effectively eliminate the impact of sliding body on the bottom working place and slope body, reduce the dilution of ore, keep rainwater from upper steps away, decrease influence of the weak intermediate layer, and cut cost of disposal waste rock. The safety and reliability of the mode were analyzed and verified from 3 aspects: static load calculation, ANSYS simulation of dynamic loading and spot experiment. The result of static loading calculation shows that the retaining wall can support accumulation and extrusion of granular body, and the glide or overturn disaster will not take place. The simulations of dynamic loading show that the retaining wall remains stable until sliding body collapses from 360 m (10 sublevels). Only one new safety cleaning bank in each 1 5 sublevels can fully meet the need of engineering. The new mode sustains steep slope mining, increases the angle of ultimate slope, and reduces invalid overburden amount of rock by 3% 5%. The result of spot experiment has verified the exactness of the above calculations and simulations.

基金信息：the National Science Fund for Distinguished Young Scholars