开采下保护层的瓦斯综合抽放技术

保护层开采是突出矿井开采煤层群,选择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,瓦斯涌出量大,如只采取单一的措施去治理,不能满足治理瓦斯的需要。介绍了下保护层开采过程中采用高位钻孔、倾向高位钻孔、上隅角埋管抽放瓦斯的综合抽放技术措施。

The Gas Comprehensive Extracting out Technology of Underside Protective Seam

The protective seam exploitation method is a kind of effective measure of selective regional prevention and control in the coal seams group mine exploitation.At the same time, there exists gas comprehensive control problem when mining protective seam. Since not only the gas flowing out of current seam, but also the gas flowing of being protected seam which is caused by releasing pressure need to be controlled, If single measure is carried out to control gas, it will not satisfy the need of gas prevention and control. The perch drill, incline perch drill, upside corner burying pipe are used to extract out gas in the process of comprehensive gas control in the protective seam exploitation, which is introduced in this paper.