摘要
针对阳泉矿区15~#煤顶板破坏进行研究,可以为煤矿的安全生产提供有效信息。通过对研究区15~#煤顶板样品进行力学性质试验研究,得出15~#煤顶板不同岩性岩石的力学参数,再结合数值模拟计算15~#煤开采顶板破坏高度及其对上覆老空积水区的影响。结果表明:15~#煤上方岩层主要为K_2灰岩及泥岩,其抗剪强度为1.18~1.21MPa;综合数值模拟的结果,15~#煤层开采片区在平均采厚为6.8m时,覆岩层垮落带的最大高度应取为31m,导水裂隙带的最大高度取76m。
The research on roof failure of 15~#coal in Yangquan mining area can provide effective information for safe production of coal mine. The mechanical properties of 15~#coal roof samples in the study area were experimentally studied. The mechanical parameters of different lithologic rocks in 15~#coal roof were obtained. Then the failure height of 15~#coal roof and its influence on the overlying old goaf water accumulation area were calculated by numerical simulation. The results showed that the strata above 15~#coal were mainly K_2 limestone and mudstone, and their shear strength was between 1.18 and 1.21 MPa. Comprehensive numerical simulation results showed that when the average mining thickness of 15~# coal mining area was 6.8 m, the maximum height of overburden caving zone should be31 m, and the maximum height of water-conducting fracture zone should be 76 m.
引文
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