北山露天矿东帮开采与回填方案边坡稳定性研究

Study on Slope Stability of East Side Mining and Backfilling Scheme of Beishan Open-pit Coal Mine

以北山露天煤矿为依据,采用极限平衡法对东帮边坡开采与回填压脚方案进行边坡稳定性研究。对以往岩土物理力学试验取得的数据进行归纳总结,获取适用于本次研究区域的岩体力学评价参数。通过对4种开采设计方案的稳定性和采煤量分析,得出最合理的开采角度为65°。由于形成单台高陡边坡,对5种回填压脚方案进行稳定性和回填量对比分析,最终得出回填压脚边坡角36°最合理。

Based on the Beishan Open-pit Coal Mine,the limit equilibrium method is used to study the slope stability of the eastern slope mining and backfill presser foot scheme.The datas obtained from previous geotechnical physical mechanics experiments are summrized to obtain the rock mechanics evaluation parameters applicable to the study area.Through the analysis of the stability and coal mining volume of the four mining design schemes,the most reasonable mining angle is 65°.Due to the formation of a single high-steep side slope,the stability and backfill amount of the five backfill presser foot schemes are compared and analyzed,and finally the backfill presser foot slope angle of 36°is the most reasonable.