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为了减少煤炭资源浪费和积极应对国家限制或地方煤矿监管部门禁止“U+L”型通风所带来的工作面瓦斯治理困局,针对兴无煤矿的近距离煤层群的特殊地况,在试验工作面的采空区开展高水充填沿空留巷项目,将工作面“U+L”型通风改为“Y”型通风,采用斜向穿层钻孔抽采邻近层卸压瓦斯。结果表明:试验采用斜向穿层钻孔方法使瓦斯抽采率提升了10%,达到47%;并且改为“Y”型通风后,采用该方法仍能解决瓦斯抽采的需要。
In order to reduce the waste of coal resources and actively cope with the national restrictions or local coal mine regulatory authorities forbid the “U + L ” type of ventilation caused by the face of gas governance dilemma, in view of the special situation of Xingwu coal mine near distance coal seams, The Gob-side entry retaining project with high water filling was carried out in the goaf of the test working face, and the ventilation of “U + L” type was changed to “Y” Layer pressure relief gas. The results show that the method of inclined borehole drilling increases the gas drainage rate by 10% to 47%; and after replacing with “Y” type ventilation, this method can still solve the need of gas drainage.