不同煤层倾角的底板采动破坏特征分析

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根据山西龙矿盘道煤业有限公司2#煤层工作面地质及水文地质条件,利用FLAC3D数值仿真软件采用变化煤层倾角的方法,对工作面底板采动破坏进行流固耦合数值模拟,分析与研究不同煤层倾角地质条件下工作面推采过程中底板采动破坏深度的变化特征。研究表明:随着煤层倾角的增大,煤层底板最大采动破坏深度呈现先增大后减小的趋势,且在煤层倾角为30°的地质条件下底板塑性破坏区深度最大。同时将理论计算与数值模拟相结合,对煤层底板进行了突水性预测,为工作面的正常开采提供了理论依据。 According to the geologic and hydrogeological conditions of 2 # coal seam face in Longyintangdao Coal Industry Co., Ltd., FLAC3D numerical simulation software was used to change the coal seam dip angle. The numerical simulation, analysis and research Variation Features of Floor Mining Destruction Depth during Mining Face Advancing under Different Inclined Geological Conditions. The results show that with the increase of coal seam dip, the maximum mining failure depth of coal seam floor firstly increases and then decreases, and the depth of the plastic deformation zone of the bottom slab is the largest under geological conditions with coal seam dip angle of 30 °. At the same time, the theoretical calculation and numerical simulation are combined to predict the water inrush of the coal floor, which provides a theoretical basis for the normal mining face.
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