特厚煤层综放采场瓦斯运移规律  

Gas emission laws of fully-mechanized sublevel caving mining in extra-thick coal seam

作　　者：姜福兴[1] 孔令海[1] 刘春刚[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]煤炭科学研究总院沈阳研究院,辽宁沈阳110016

出　　处：《煤炭学报》2011年第3期407-411,共5页Journal of China Coal Society

基　　金：国家重点基础研究发展计划(973)项目(2010CB226803);国家"十一五"科技支撑计划(2007BAK24B04);国家自然科学基金资助项目(40674017)

摘　　要：采用高精度微地震监测技术,结合岩石力学理论进行分析,得到了特厚煤层综放工作面采场围岩破裂规律。根据综放采场瓦斯运移规律和工作面超前煤体的百米钻孔瓦斯自然涌出量的现场实测,确定了导致工作面超限的瓦斯主要来自于采空区,给出了可抽放瓦斯的范围。通过分析岩层运动规律与工作面瓦斯浓度变化规律,证明工作面瓦斯的涌出主要受高位岩层周期运动的影响。Using the underground high precision microseismic monitoring system,analyzed the gas emission laws,combining rock mechanics and rock pressure theory,extra-thick coal seam of the top-coal caving face rock movement and the relationship between gas emission were studied.Monitoring results show the distribution laws of three-dimensional fracture and the movement of strata,thus the reasonable scope of gas drainage can be pointed out.Meanwhile,natural gas emission measurement of the 100 meters drilling site show that a large number of overrun gas mainly transfer from the goaf area.Comparative study on rock movement and the gas concentration changes show that face gas emission is primarily affected by the periodic fracture of the high altitude roof.

关 键 词：特厚煤层 综放采场 瓦斯运移 高精度微地震监测 微震事件分布 岩层运动规律 

分 类 号：TD712.52[矿业工程—矿井通风与安全]