摘要
针对低透气性煤层对拉工作面上隅角瓦斯经常超限的问题,提出了高位钻孔技术,通过实验室相似模拟试验及现场工业性试验,确定了高位钻孔的技术参数。现场应用表明,高位钻孔瓦斯抽采效果显著,对拉工作面绝对瓦斯涌出量由7.342 m3/min降至3.472 m3/min,工作面回风巷瓦斯浓度稳定在0.4%左右,上隅角未发生瓦斯超限现象,工作面瓦斯抽采率达57.7%。
Aimed at the low gas permeability coal seam double-unit face upper corner gas often overrun ,high level borehole layout parameters are determined based on laboratory similarity test and field experiment .The practice shows that this technol-ogy is obviously effective ,the absolute gas emission in working face is reduced from 7 .342 m3/min to 3 .472 m3/min ,air gas concentration is stabilized at about 0 .4% ,the upper corner gas has not been over limited and the working face extraction rate can reach 57 .7% .
出处
《工业安全与环保》
北大核心
2015年第11期54-56,共3页
Industrial Safety and Environmental Protection
关键词
低透气性煤层
对拉工作面
上隅角
高位钻孔
low gas permeability coal seam
double-unit face
upper corner
high level borehole
作者简介
凌志迁，1983年生，江苏连云港人，工程师，毕业于中国矿业大学，现在四川省安全科学技术研究院工作。
