On the basis of the repeated mining in the underground mining area,we analyze the numerical simulation results of extended deep mining of the east open pit,study the mechanism of slope slip induced by shaft-transferred open pit min-ing,analyze the influence of shaft mining on open pit slope,and calculate the settlement and displacement.The results show:The influence of the activation induced by open pit mining on the stability of the slope increases.Due to the activation effect,the pit bottom vector direction basically points to the underground goaf direction,integrated vector points differently in different regions in the upper part,indicating that the space of underground goaf for top coal mining is affected by continuous activation,the void space gradually decreases,the remaining space continues to press tight.With the continuous mining of the slope,when the slope is located on the descending direction side of the main section,the stress effect increases after the vector synthesis,which adversely affects the stability of the slope;when the slope is located on the uphill direction side of the main section,after the synthesis of both vectors,some of the stresses will offset each other,which is beneficial for the slope stability.
关键词
露天延深开采/数值模拟/滑移机理/多次重复采动/边坡稳定性/活化效应
Key words
open pit deep mining/numerical simulation/slip mechanism/repeated mining/slope stability/activating effect
维普
万方数据