基于有限元数值模拟的顶板破坏高度研究——以阳泉矿区15~#煤为例
|
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.
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
[1]徐振永.沁水盆地晚古生代煤系层序地层及岩相古地理研究[J].煤田地质与勘探,2007(4):122-125.
[2]李增学,余继峰.华北陆表海盆地海侵事件聚煤作用研究[J].煤田地质与勘探,2002(3):1-5.
[3]熊德国,赵忠明,苏承东,等.煤系地层岩石力学性质影响的试验研究[J].岩石力学与工程学报,2011(5):998-1006.
[4]侯兰杰.砂岩组构与岩石力学性质关系的研究[J].绵阳经济技术高等专科学校学报,2002(1):1-5.
[5]朱国维,丁雯,武彩霞.华北煤田底板矿井水分布及突水机理浅析[J].中国煤炭,2008(2):9-11.
[2]李增学,余继峰.华北陆表海盆地海侵事件聚煤作用研究[J].煤田地质与勘探,2002(3):1-5.
[3]熊德国,赵忠明,苏承东,等.煤系地层岩石力学性质影响的试验研究[J].岩石力学与工程学报,2011(5):998-1006.
[4]侯兰杰.砂岩组构与岩石力学性质关系的研究[J].绵阳经济技术高等专科学校学报,2002(1):1-5.
[5]朱国维,丁雯,武彩霞.华北煤田底板矿井水分布及突水机理浅析[J].中国煤炭,2008(2):9-11.