典型残矿回采结构模型及稳定性分析

基于某矿山残矿回采工程，选取典型的残采工程体构建结构模型，运用梁理论和FLAC^3D软件，结合容许极限位移量破坏理论研究采场顶板的稳定性，对比梁理论和数值模拟分析结果的异同，对模型稳定性进行综合评价，并进行现场校验。研究结果表明：残采结构模型基本能客观反映残采作业紧邻采空区、崩落区的情况；残采模型Ⅰ和模型Ⅱ处于稳定状态，模型Ⅲ则处于不稳定状态；验证得出，模型Ⅰ相应的回采方案是可行的，模型Ⅱ相应区域的岩体是稳定的，模型Ⅲ相应的回采方案需作出调整；梁理论和数值模拟两者的分析结果差异不显著，与现场调研结果基本一致，两者结合可达到良好效果。

Mining Structure Model of Typical Residual Ore and Its Stability Analysis

Based on a residual ore mining project，a typical residual mining area is selected to establish structure models.The stability of stope roof was studied by using beam theory and FLAC^3D software，which combined with damage theory of permissible limits of displacement.Then，the stability of these models was comprehensively evaluated through finding the similarities and differences of the beam theory and the numerical simulation.At last，the research findings were verified by on-site tests.The research shows that the mining structure models of residue ores can basically reflect the actual situation that the residual ore mining operations are adjacent to goafs and breakout zone.And structure model Ⅰ and model Ⅱ are stable，but model Ⅲ is unstable，which means that the corresponding stoping scheme of model Ⅰ is feasible，the corresponding region of model Ⅱ is stable and the corresponding stoping scheme of model Ⅲ needs to make adjustments.Furthermore，there is no significant difference between beam theory′s and numerical simulation′s results，which is consistent with the results of on-site survey.Combination of both beam theory and numerical simulation can achieve good results.