深部保护层开采煤岩体动力学演化的参数计算分析

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。

Parameter Calculation Analysis of the Coal Rock Dynamical Evolution of the Deep Protective Seam Mining

Through taking the mining face of Ji14-31010 protective seam in the Twelve Coal Mine of Pingdingshan Tian'an Coal Industry Co.,Ltd as a test prototype,it made numerical simulation experiments,and analyzed the effects of mining height,seam spacing,interlaminar lithology on underlying coal-rock relief.By comparing the calculation results of protective seam mining heights which included 0.65 m,1.3 m and 2.6 m,it obtained that the bigger the mining height was,the better the pressure relief effect for the protected seam was.By comparative calculation for seam spacing of 9.1 m and 29.1 m,it attained that the relief effect of protective seam became worse and worse with the increase of the seam spacing.By comparative calculation for different interlaminar lithology,it obtained that pressure relief protective effect for the protected seam below would be affected by the presence of interlaminar hard rock.