中文摘要：

为了解决高瓦斯特厚煤层综放工作面瓦斯超限问题,分析了工作面瓦斯源的构成,以彬长矿区某矿综放工作面为研究对象,提出了本煤层采用顺层平行孔与扇形钻孔相结合的方法抽采瓦斯,沿煤层顶板与回风顺槽水平内错掘进瓦斯专用抽放巷,上隅角采用埋管抽采及均压通风技术,与瓦斯专用抽放巷协同治理上隅角和采空区瓦斯,风障导流稀释法等一系列技术措施。现场应用表明,工作面上隅角瓦斯体积分数由0.68%降低至0.2%以下,回风巷口瓦斯体积分数由0.7%降低至0.4%,风排瓦斯量由20 m~3/min降低至5 m~3/min以下,瓦斯抽采率保持在85%以上,最大值达到95%左右。表明此套瓦斯综合治理技术应用到高瓦斯特厚煤层综采放顶煤工作面瓦斯治理中是切实可行的。

英文摘要：

In order to overcome the gas overrunning of fully mechanized top coal caving face in high gas extra - thick coal seam, the composition of the working face gas source is analyzed. Taking the working face of a certain mine in Bin- chang mining area as the research object, a series of technical measures are proposed, such as the coal seam gas is ex- tracted by combining bedding drilling and fan - shaped drilling, driving gas drainage roadway along the coal seam roof and horizontal dislocation with the return air roadway, using buried tube in upper corner extraction and equalizing venti- lation technology, with special gas drainage roadway collaborative governance gas in goaf and upper corner, using wind- break diversion dilution method and so on. Field application shows that the upper corner gas concentration is reduced from 0.68% to below 0.2% , the return air roadway gas concentration reduced from 0. 7% to 0.4%, the exhaust gas quantity reduced from 20 m^3/min to 5 m^3/min below by ventilation roadway, the gas extraction rate keeps above 85% and the maximum value reaches around 95%. Thus it is proved that this set of comprehensive gas control system is fea-sible to comprehensive gas treatment in fully mechanized top coal coving face of high gas extra-thick coal seam.