复杂应力条件下露天矿高边坡动态开采模拟与响应分析  

Dynamic Mining Simulation and Response Analysis of High Slope in Open-pit Mine Under Complicated Stress Conditions

作　　者：张鹏[1,2] 于兆成 宋晓丽 杨涛 ZHANG Peng;YU Zhaocheng;SONG Xiaoli;YANG Tao(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China;Collaborative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone,Qingdao 266033,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]山东省蓝色经济区工程建设与安全协同创新中心,山东青岛266033

出　　处：《煤矿安全》2018年第11期233-236,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(41402275);山东省高等学校科技计划资助项目(J13LG14);青岛市建设事业科技发展资助项目(JK2014-14)

摘　　要：针对露天转地下开采边坡在双重应力作用下的稳定性问题,以某大型露天煤矿边坡北边帮为研究对象,借助数值模拟手段开展了不同工况下边坡在动态地下开采作用下的响应分析与稳定性评价。选取对矿区生产与安全影响较大的北边帮中部区域作为目标研究区,应用Midas Nx有限元软件,模拟边坡在井工开采前后、4#、9#煤工作面不同推进深度时的边坡动态响应。研究结果表明:采空区的存在会降低边坡的安全系数,并引起采空区覆岩的应力重分布,使上覆岩体产生变形破坏,影响边坡的稳定性,确定了采空区对边坡的影响程度与采空区的规模、位置有关,同时确定回采边线的位置对边坡的稳定性及资源采出率至关重要。Aiming at the stability problem of slope for the transiton from open-pit to underground mining under double stress,taking the northern side slope of a large opencast coal mine as the research object, the response analysis of the slope under different working conditions and dynamic underground mining were carried out by means of numerical simulation and stability evaluation. Midas Nx finite element software is applied to simulate the central part of the northern margin of the coal mines, which has a great influence on mining production and safety in the target area. The dynamic response of the slopes was analyzed respectively considering the different depth of No.4 and No. 9 coal. The results show that the existence of goaf will reduce the safety factor of slope and cause the stress redistribution of overlying strata in goaf, which will cause deformation and failure of overlying rock mass and affect the stability of slope. The degree of influence on the slope is related to the size and location of the goaf. It is also important to determine the location of the mining side slope for slope stability and resource recovery rate.

关 键 词：露采转地采 高边坡 动态开采模拟 响应分析 稳定性评价 

分 类 号：TD824[矿业工程—煤矿开采]