水岩耦合作用对煤层采动影响数值模拟分析

Numerical Simulation of Coal Mining Impact under the Condition of Water-rock Coupling

为研究水岩耦合作用对五沟煤矿1019工作面开采的影响,建立Flac3D模型,使用Flac3D内置的渗流模式分析渗流作用下“四含”对工作面采动的影响,并与关闭渗流模式的分析结果进行对比,发现水岩耦合作用提高了水平应力集中程度,增加了开采区上方的竖向位移和开采区两侧的水平位移,对煤层的开采带来不利的影响。

In order to study the influence of water-rock coupling on the mining of 1019 face in Wugou Coal Mine, this paper establishes the Flac3D model, and uses the built-in seepage model of Flac3D to analyze the influence of the fourth aquifer of the Cenozoic on the mining face under the seepage, and compares it with the analysis result of the closed seepage mode. It has been found that water-rock coupling increased the horizontal stress concentration, increased the vertical displacement above the mining area and the horizontal displacement on both sides of the mining area, which adversely affected the mining of coal seams.