CAJ | 학술논문

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％。
침대저투기성매층대랍공작면상우각와사경상초한적문제，제출료고위찬공기술，통과실험실상사모의시험급현장공업성시험，학정료고위찬공적기술삼수。현장응용표명，고위찬공와사추채효과현저，대랍공작면절대와사용출량유7．342 m3／min강지3．472 m3／min ，공작면회풍항와사농도은정재0．4％좌우，상우각미발생와사초한현상，공작면와사추채솔체57．7％。
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% .