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针对平宝煤业公司己15-17-12041回采工作面采空区瓦斯涌出量大,引发工作面上隅角及回风流中瓦斯浓度过大的问题,采用了低位巷大孔径穿层钻孔治理采空区瓦斯的措施,并在回风平巷钻孔末端安装1个朝向采空区方向的90°弯头,利用抽放负压的作用将工作面采空区瓦斯由上隅角向采空区深部运移。将过去以“封堵”治理上隅角瓦斯的指导思想转变为“疏导”。使得工作面上隅角及回风流中瓦斯浓度由原来的0.56%~0.86%、0.4%~0.75%转变为0.18%~0.34%、0.05%~0.17%,效果非常显著。
In view of the problem that the gas emission from the mined-out area in the 15-17-12041 working face of the Pingbao Coal Company has been large, which causes the gas concentration in the upper corner of the working face and the return air flow to be too large, Hole goverment gas control measures, and in the return airway drilling end of the installation of a direction toward the goaf 90 ° elbow, the use of suction negative pressure of the work area goaf gas from the upper corner Go deep into goaf. In the past to “plug ” management of the corner gas guiding ideology into “divert ”. As a result, the gas concentration in the upper corner of the working face and return air flow was changed from 0.56% ~ 0.86% and 0.4% ~ 0.75% to 0.18% ~ 0.34% and 0.05% ~ 0.17%, respectively.