高位钻孔技术在治理对拉工作面上隅角瓦斯中的应用  

Application of the High Level Borehole Technology in the Gas Governance of Double- unit Face Upper Corner

作　　者：凌志迁[1] 杨百顺[1,2] 吴强[1,2] 李逸[1] 

机构地区：[1]四川省安全科学技术研究院,成都610000 [2]中国矿业大学采矿工程学院,江苏徐州221000

出　　处：《工业安全与环保》2015年第11期54-56,共3页Industrial Safety and Environmental Protection

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% .

关 键 词：低透气性煤层 对拉工作面 上隅角 高位钻孔 

分 类 号：TD712.6[矿业工程—矿井通风与安全]