开采下保护层的瓦斯综合治理技术

Comprehensive Gas Control in Extraction of Lower Protective Seam

保护层开采是突出矿井开采煤层群时选择的区域性防治突出的有效措施,但在开采保护层时也存在瓦斯综合治理的问题,因为开采保护层时既有本层瓦斯涌出的治理,还存在被保护层卸压瓦斯涌出的治理,本文介绍了下保护层开采过程中采用拦截钻孔、高位钻孔及“P”型短尾巷抽放瓦斯的综合治理技术措施。

The extraction of protective coal seams is an effec tive mea sure for the prevention and control of re gional gas out burst used in the mining of group of seams in outburst mines.How ever,gas still needs to be compre-hen sively con trolled during the ex trac tion of pro tective seams,this in-cludes the prevention and control of the gas emission from the protec tive seam to be mined and the relief gas from the protected seam.This paper describes some tech nical measures for the comprehensive gas pre vention and control during the extrac tion of lower protective seam,in cluding in-tercep tion bore-holes,highly-lo cated bore-holes and gas drainage from″P″type tail gate.