千米深井大采高采场围岩应力分布规律数值分析  

Numerical Analysis on Stress Distribution Law of Surrounding Rocks in High Cutting Coal Mining Face of 1000m Deep Mine

作　　者：张培鹏[1] 蒋金泉[2] 曲华[2] 许丽娜[1] 

机构地区：[1]山东科技大学资源与环境工程学院,山东青岛266590 [2]山东科技大学矿山灾害预防控制重点实验室,山东泰安271002

出　　处：《煤炭工程》2014年第5期48-50,共3页Coal Engineering

基　　金：山东科技大学2012-2013年度研究生科技创新基金资助项目(YCA120301)

摘　　要：煤矿深部开采的应力集中异常突出，以唐口煤矿1305工作面为例，利用FLAC^3D有限差分软件对千米深井大采高采场围岩应力分布规律进行数值分析。模拟结果表明：1305工作面回采时，在采空区四周煤体内形成对称的“双肺”状支承压力影响区；随着工作面推进，采场支承压力峰值及采空区上覆岩层破坏高度逐渐增大，工作面见方后，采空区顶板破坏高度与超前支承压力峰值变化趋于稳定，支承压力最大峰值约为72MPa，应力集中系数丘为3．0；工作面煤壁前方与采空区两侧煤体内支承压力峰值随工作面推进向深部转移，且支承压力影响范围逐渐增大，压力峰值与工作面煤壁之间的距离基本保持在8—15m范围内。The issue of stress concentration in coal mine deep mining was particularly serious, with the engineering example of working face 1305 in Tangkou mine, numerical analysis was conducted on ground stress distribution laws of one kilometer deep stope with large mining height with FLAC3D. The results showed that, as mining started in working face 1305, a ＂double- lungs＂ shape symmetrical abutment pressure affected zone formed in the surrounding rocks; with the advance of working face, the peak of stope abutment pressure and overlying strata failure height of goaf gradually increases gradually, and the change tends to stabilize behind working- face square, the maximum peak is about 72MPa and stress concentration factor is 3.0 ; abutment pressure peak value inside the coal in the front of working face coal wall and beside the gob area transfers to the deep, and the influence scope of abutment pressure gradually increases, the distance between the pressure peak value and the coal wall of working face is basically within the range of 8 to 15m.

关 键 词：千米深井 大采高 支承压力 数值模拟 应力集中 

分 类 号：TD322[矿业工程—矿井建设]