以开元煤矿9801综放工作面为研究对象,针对综放工作面初采期瓦斯频繁超限的问题,结合工作面上覆煤岩层覆存状态及采动破断规律,提出了9801综放工作面初采期局部高抽巷布置方案:局部高抽巷分为初采倾向高抽巷段、走向高抽巷段和辅助倾斜高抽巷段3段,顺序联结成抽采系统;初采倾向高抽巷段布置在6号煤层中,至开切眼水平距离为15 m;走向高抽巷段布置在3号煤层中,至工作面的垂直距离为43 m,与回风巷的距离为4 m。现场实际应用表明:回风瓦斯体积分数控制在0.6%左右,尾巷瓦斯体积分数控制在1.4%左右,较好地解决了9801综放工作面初采期瓦斯超限断电问题。

Taking No.9801 fully mechanized top coal caving mining face in Kaiyuan Mine of Yangquan Coal Group as a study object,according to the frequent gas 0 ver limit occurred at initial mining period of fully mechanized top coal caving mining face,in combination with the deposit status and mining failure law of overburden coa I and rock strata above the coal mining face,a local high level gas drainage gateway layout plan at initial mining period of No.9801 fully mechanized top coal caving face was provided.The local high level gas drainage gateway could be divided to three sections,as inclined high level gas drainage gateway at initial mining period,strike hig h level gas drainage gateway and auxiliary inclined high level gas drainage gateway and the three sections could be linked as a gas drainage system. The inclined high I evel gas drainage gateway section at initial mining period was set at No.6 seam with a horizontal distance of 15 m to the open off cut.The strike high level gas drainage gateway section was set in No.3 seam with a vertical distance of 43 m to the coal mining face and with a distance of 4 m to air returning gateway.The site actual applica tion showed that the gas volume fraction in air returning gateway was controlled about 0.6%.The gas volume fraction in tail gateway was controlled about 1.4% and thus the gas over limit and power off problems at initial mining period of No.9801 fully mechanized top coal caving mining face were solved.

国家自然科学基金重点资助项目(50834005)；煤炭资源与安全开采国家重点实验室自主研究课题资助项目(SKLCRSM08X05)；江苏高校优势学科建设工程资助项目(SZBF2011-6-B35)；