厚煤层综放开采条件下瓦斯运移规律与治理技术  

Gas Migration Rule and Control Technology under Full-mechanized Caving of Thick Coal Seam

作　　者：李鹏 LI Peng(Jiaojiazhai Coal Mine,Xuangang Coal Power Company,Jinneng Holding Group,Xinzhou 034110,China)

机构地区：[1]晋能控股集团轩岗煤电公司焦家寨煤矿,山西忻州034110

出　　处：《煤》2025年第4期14-17,共4页Coal

摘　　要：为解决焦家寨煤矿22115综放工作面回采期间的瓦斯超限问题,采用现场实测、数值模拟、工业应用等方法揭示了煤层瓦斯含量与解吸量的差异性,探究了瓦斯体积分数在采空区内的空间分布规律,设计了走向高位钻孔抽采方案。结果表明:工作面回风侧及采空区深部瓦斯体积分数高,进风侧及浅部区域体积分数低,回风侧采空区高体积分数瓦斯区域宽度大于进风侧。垂直方向上,瓦斯体积分数随层位升高而递增。倾斜方向上,回风侧瓦斯体积分数高于进风侧,且在上隅角区域尤为突出。通过实施走向高位钻孔抽采技术,回风巷最大瓦斯体积分数从0.88%降至0.68%,上隅角从1.4%降至0.86%,验证了技术的可靠性与有效性。In order to solve the problem of gas overlimit during the stoping of 22115 fully-mechanized caving face in Jiaojiazhai Coal Mine.The differences between gas content and desorption amount of coal seam are revealed by field measurement,numerical simulation and industrial application,and the spatial distribution of gas volume fraction in goaf is explored.The results show that the volume fraction of high gas volume in gob side and deep side of gob is high,the volume fraction in air inlet side and shallow side is low,and the width of high gas volume fraction area in gob side of air return side is larger than that in air inlet side.In the vertical direction,the volume fraction of gas increases with the elevation of bedding.In the inclined direction,the volume fraction of gas on the return air side is higher than that on the inlet air side,especially in the upper corner.The maximum volume fraction of gas in the return air roadway was reduced from 0.88% to 0.68% and the upper corner from 1.4% to 0.86%,which verified the reliability and effectiveness of the technology.

关 键 词：厚煤层 综放开采 瓦斯治理 高位钻孔 

分 类 号：TD712[矿业工程—矿井通风与安全]