摘要
Abstract
In this paper,the problem of gas extraction in the drilling field of the auxiliary coal uncovering roadway in the low extraction roadway of the Ji 15-17-13120 air roadway in the thirteenth mine of Pingdingshan Coal Co.,Ltd.was studied.The causes of the problems such as large water output,difficult slag discharge,low hole forming rate and unsatisfactory drainage effect are analyzed.In order to solve these technical problems,the improvement scheme of constructing drainage holes on the left and right sides of the borehole and using air compressor for strong pressure air drainage and slag discharge is proposed.Through the implementation of this scheme,it is expected to significantly improve the drilling construction efficiency and hole formation rate,optimize the gas extraction effect,ensure the safety of coal mining,and realize the effective utilization of gas resources.关键词
下行钻孔/瓦斯抽采/排水孔/排水排渣/成孔率Key words
downward drilling/gas extraction/drainage hole/drainage slag/pore-forming rate分类
矿业与冶金
