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通过将平煤股份十二矿的己14-31010保护层开采工作面作为试验原型进行了数值模拟试验,分析了开采高度、层间距、层间岩性对下伏煤岩体卸压的影响。通过对比保护层采高分别为0.65、1.3、2.6 m的计算结果,得知采高越大,对被保护层的卸压保护效果越好;通过层间距为9.1 m和29.1 m的对比计算,得知随着层间距的增加,保护层的卸压效果越来越差;通过不同层间岩性的对比计算,得知层间坚硬岩层的存在,将影响对下被保护层的卸压保护作用。
The Pingdingshan No.12 Mine has its own protective layer mining face as the experimental prototype numerical simulation test, analysis of mining height, layer spacing, interlaminar lithology on the underlying coal and rock pressure relief. By comparing the calculation results of the protective layer mining height of 0.65, 1.3 and 2.6 m respectively, it is found that the bigger the mining height is, the better the pressure relief protection of the protected layer is. With the comparison of the layer spacing of 9.1 m and 29.1 m, It is learned that with the increase of interlayer spacing, the pressure relief effect of the protective layer is getting worse and worse. Comparing the lithology of different layers, it is found that the existence of hard interlayer in the interlayer will affect the pressure relief protection effect.