Analysis of Gas Control Technology and Effectiveness in Goaf
The gas concentration within a 150 meter range of the goaf after the support frame in the 204 working face of Dianping Coal Mine is as high as 4.7％,which leads to serious gas exceeding the limit in the upper corner of the working face,the gap between the support frames,and the working face,which restricts the safe and efficient mining of the working face.Through technical research,Dianping Coal Mine conducted a reasonable analysis of the reasons for gas exceeding the limit in the goaf of the 204 working face.The goaf was equipped with buried pipes,high-level fracture zone drilling,and long and short holes along the coal seam,and combined gas control technologies such as Y-shaped ventilation were adopted.Practical applications have shown that after adopting the combined gas control technology,the gas concentration in the goaf after the middle frame of the mining face is controlled below 1.0％,and there is no gas exceeding the limit phenomenon in the upper corner and the working face,achieving significant application results.
fully mechanized mining facegoafreasons for gas exceeding limitgovernance technologyeffect analysis
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