高瓦斯综放工作面瓦斯综合治理技术研究与应用

发布时间：2018-10-29 17:03

【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。
[Abstract]:In order to solve the problem of gas exceeding limit in fully-mechanized caving face of high-gas and super-thick coal seam, this paper analyzes the composition of gas source in working face, and takes a fully mechanized caving face in Bingchang mining area as the research object. It is put forward that the method of gas extraction in this coal bed is the combination of parallel hole and fan hole in this coal bed, the special gas drainage roadway is driven along the roof of the coal seam and the return air along the horizontal fault tunnel, the upper corner adopts the technique of burying pipe extraction and even pressure ventilation. A series of technical measures, such as gas control in upper corner and goaf, wind barrier diversion dilution method, etc. The field application shows that the volume fraction of gas in the upper corner of the working face is reduced from 0.68% to less than 0.2%, the volume fraction of gas at the entrance of the return air roadway is reduced from 0.7% to 0.4, and the amount of gas discharged by the air is reduced from 20 m~3/min to less than 5 m~3/min. The gas extraction rate is kept above 85%, and the maximum value is about 95%. It shows that it is feasible to apply this comprehensive gas control technology to fully mechanized top coal caving face with high gas and extra thick coal seam.
【作者单位】：内蒙古科技大学矿业研究院;内蒙古第六地质矿产勘察开发院;
【基金】：国家自然科学基金(51364028,51064018)
【分类号】：TD712

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