工作面采动中割缝钻孔与普通钻孔瓦斯抽放试验研究

Testing Study of Gas Drainage of the Cutting Drilling and Drilling in the Advancing of Working Face

采用FLAC-3D有限差分软件,模拟了工作面前方普通钻孔和割缝钻孔区域的支承压力分布规律,在对现场瓦斯抽放测量的基础上,研究了工作面推进过程中超前支承压力对普通钻孔和水力割缝钻孔瓦斯抽放的影响,得出:当工作面推进到一定距离时,割缝钻孔瓦斯抽放增长速度是普通钻孔的4倍,其结论为工作面煤壁前方瓦斯合理抽放提供了理论依据和技术支持。

The abutment pressure distribution laws of the drilling and cutting drilling regional in frontage of workface is simulated with the FLAC-3D simulating software in this paper. Basis on the spot test of gas drainage,studies,during the advancing of working face,the coupling infulence of advanced abutment pressure on gas drainage of the drilling and cutting drilling,gains,when working face advances some distance,the gas drainage increasing rate of cutting drilling is about 4 times to that by drilling,the conclusion provides theoretical base and technical support to gas reasonable drainage in frontage of workface.