为了预防工作面底板突水,保证矿井的安全生产,以梁北煤矿11141工作面为工程背景,采用数值模拟研究了带压开采工作面推进距离、埋深、煤层厚度、断层及断层位置等不同条件对底板破坏深度的影响.研究结果表明,工作面推进距离越大底板破坏深度越大,但推进至60m后,底板破坏深度保持不变趋于稳定;埋深越大底板破坏深度越大,400m埋深增加到800m埋深,每增加200m埋深,增大速度由50%降至12.25%,增大速度逐渐减小;煤层厚度越大,底板的破坏范围越大,对底板的破坏深度无影响;存在断层则底板破坏深度越大,底板最大破坏深度增加18.2%,断层位于初次来压影响范围内比位于周期来压影响范围内对底板破坏深度的影响要剧烈.%In order to prevent water-inrush from floor in working face and ensure the safety production of mine, taking the 11141 working face of Liangbei Coal Mine as engineering background, numerical simulation was applied to study the influence of different conditions on the floor failure depth in coal mining above aquifer, such as advanced distance of working face, burial depth, thickness of coal seam, fault and fault location. The study results showed that: the greater the advanced distance of working face, the greater the floor failure depth is, but after the advanced distance reaches 60m, the floor failure depth remains unchanged and tends to stabilize. The greater the burial depth, the greater the floor failure depth is, the buried depth increases from 400m to 800m, the growth rate decreases from 50% to 12.25% with an increase of 200m buried depth, the increasing speed gradually reduces. With the increase of coal seam thickness, the damage range of floor expends, while there is no influence on the floor failure depth. The floor failure depth is greater when there is a fault, the maximum failure depth of the floor increases by 18.2%, it will be more severe for the impact of floor failure depth when the fault is located within the range of first weighting than that located within the range of periodic weighting. The research conclusion can offer references for the safe mining of working face in coal mining above aquifer.
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