巨厚火成岩对煤层瓦斯赋存及突出灾害的影响  

Effects of an extremely thick igneous rock on gas occurrence and outburst disasters in a coal seam

作　　者：王亮[1] 程远平[1] 聂政[2] 王海锋[1] 杨云[1] 刘杰[1] 

机构地区：[1]中国矿业大学安全工程学院煤矿瓦斯治理国家工程研究中心,江苏徐州221116 [2]淮北矿业集团海孜煤矿,安徽淮北235000

出　　处：《中国矿业大学学报》2011年第1期29-34,共6页Journal of China University of Mining & Technology

基　　金：国家重点基础研究计划(973)项目(2005CB221503);国家自然科学基金重点项目(70533050);国家自然科学基金项目(50674089);中国矿业大学青年科研基金项目(2009A005)

摘　　要：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煤层覆岩中巨厚火成岩的力学性能,探讨了巨厚火成岩对远程10煤层瓦斯赋存与突出灾害的影响.结果表明:10煤层受巨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,极限吸附量达到31.675 3 m3/t;同时,巨厚火成岩均厚达120 m,单轴抗压强度平均为144.21 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,且由于巨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.The mechanical properties of the extremely thick igneous rock above the No.10 coal seam in the Haizi coal mine were determined from core testing,testing of coal samples,and field observations.The effect of these properties on gas occurrence and outburst of No.10 coal seam was obtained.Metamorphic extent and adsorption properties of coal seams increase by high temperature baking of the igneous rock.The limiting adsorbed amount could reach 31.675 3 m3/t.The average thickness of the igneous rock is 120 meters and its average compression strength is 144.21 MPa.This rock is the key stratum in this coal mine.The rock stops gas emission,which causes high gas content and the possibility of outburst.The igneous rock does not subside or break for a long time,which causes stress concentration range around the stope of the working face to be enlarged by about 100 meters.These results show the essential conditions for coal and gas outburst in the No.10 coal seam located under the extremely thick igneous rock.

关 键 词：巨厚火成岩 瓦斯赋存 突出 

分 类 号：TD713[矿业工程—矿井通风与安全]