巨厚火成岩对煤层瓦斯赋存及突出灾害的影响 - 矿业工程.PDF

40 1 Vol.40 No. 1 2011 1 Journal of China University of Mining Technology Jan. 2011 1 1 2 1 1 1 王 亮 , 程远平 , 聂 政, 王海锋 , 杨 云 , 刘 杰 ( 1. , 22111 ; 2. , 235000) : 通过采用火成岩取芯化验煤样测试及现场观测等方法, 分析了海孜煤矿10 煤层覆岩中 厚火成岩的力学性能, 探讨了 厚火成岩对远程 10 煤层瓦斯赋存与突出灾害的影响. 结果表 明: 10 煤层受 厚火成岩的高温烘烤作用, 煤体变质程度增高, 煤层瓦斯吸附量增大, 极限吸附 3 量达到 31 75 3 m / t; 同时, 厚火成岩均厚达120 m, 单轴抗压强度平均为 14421 MPa, 为矿 井的主关键层, 其阻碍了煤层瓦斯逸散, 使煤层瓦斯含量高, 且由于 厚火成岩长期保持不断裂, 导致10 煤层工作面两端应力集中影响范围大大增加, 达到100 m 左右, 更易具备煤与瓦斯突出 的必要条件. : 厚火成岩; 瓦斯赋存; 突出 : TD 713 : A : 100019 4( 2011) 0100290 Effects of an extremely thick igneous rock on gas occurrence and outburst disasters in a coal seam 1 1 2 1 1 1 WANG Liang , CHENG Yuanping , NIE Zheng , WANG Haifeng , YANG Yun , LIU Jie ( 1. School of Safety Engineering, National Engineering Research Center for Coal Gas Control, China University of Mining Technology, Xuzhou, Jiangsu 22111 , China; 2. H aizi Coal Mine, H uaibei Mining Industry Group, H uaibei, Anhui 235000, China) Abstract: T he mechanical properties of the extremely thick igneous rock above the No. 10 coal seam in the H aizi coal mine w ere determined from core testing, testing of coal samples, and field observations. T he effect of these properties on gas occurrence and outburst of No . 10 coal seam w as obtained. M etamorphic extent and adsorption properties of coal seams increase by high temperature baking of the igneous rock. The limiting adsorbed amount could reach 3 31. 75 3 m / t. The average thickn