CAJ | 학술논문

针对孟津煤矿二2煤层弱突出危险性的特点，以及11031工作面胶带、轨道顺槽掘进速度缓慢的问题，研究不同孔径钻孔的卸压范围和抽放效果。采用大直径钻孔，钻孔分区式布置对现有区域消突技术进行优化，孔径113 mm的抽放钻孔单孔抽放瓦斯纯量为孔径94 mm的1.8倍。表明大径顺层长钻孔的应用，能够有效消除煤巷预抽条带瓦斯突出危险，提高掘进速度，确保掘进工作面的安全生产。
침대맹진매광이2매층약돌출위험성적특점，이급11031공작면효대、궤도순조굴진속도완만적문제，연구불동공경찬공적사압범위화추방효과。채용대직경찬공，찬공분구식포치대현유구역소돌기술진행우화，공경113 mm적추방찬공단공추방와사순량위공경94 mm적1.8배。표명대경순층장찬공적응용，능구유효소제매항예추조대와사돌출위험，제고굴진속도，학보굴진공작면적안전생산。
Aiming at the weak risk of outburst in seam Ⅱ2 in Mengjin Mine and the problem of slow advance rate in working face11031, the ranges of pressure relief and drainage effects of drill holes with different bore diameters were studied. Large diameter drilling was applied. The optimization of existing regional outburst elimination technology was carried out by the partition layout of drill holes. The outburst elimination effects were investigated in the area where measures were taken, it was found that a single hole drainage with 113 mm bore diameter was 1.8 times higher than that that of 94mm. The results indicated that the application of large diameter borehole in seam could eliminate gas outburst risk with pre-drainage of stripe gas effectively, enhance excavation speed and ensure the safe production in working face.