基于应力-渗流耦合效应的含断层煤层底板破坏特征分析
Floor Failure Features Analysis of Faults Seam Based on Stress-seepage Coupling Effect
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摘要: 为研究工作面上、下盘开采顺序对底板破坏特征的影响规律，以菏泽龙固煤矿1302工作面采场条件为工程背景，基于FLAC3D数值仿真软件对该工作面底板破坏进行流固耦合数值模拟。研究表明：先开采下盘煤层时，断层带附近孔隙水压力较为集中，采动应力对底板塑性区的破坏性较大，且底板破坏深度较先开采上盘煤层时大5 m。因此，为了安全开采，应当采取“先开采上盘煤层，后开采下盘煤层”的开采方式。Abstract: In order to study influence laws of upper and lower panel mining sequence on floor failure characteristics, taking the conditions of Heze Longgu Coal Mine 1302 working face as engineering background, the fluid-solid coupling numerical simulation of working face floor mining-induced damage is carried out. Research shows that when lower panel is mined, the pore water pressure of fault fracture zone is more concentrated, mining stress has larger destructive on floor plastic area, failure depth is deeper 5 m than the first mined hanging wall. For safety mining, taking the mining method of "first mining upper panel, then mining lower panel" can provide a theoretical basis for normal mining of working face.
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