新景煤矿综采放顶煤工作面初采期间瓦斯涌出及治理效果分析

Analysis on gas emission and control effect of fully-mechanized top coal caving face in Xinjing Coal Mine during initial mining

新景煤矿为煤与瓦斯突出矿井,15028工作面回采期间主要瓦斯治理措施为高抽巷和低位抽采巷抽采。分析了15028工作面回采初期30 d内瓦斯涌出情况,对各项治理措施效果进行了考察。综合分析可知:随着工作面回采推进,瓦斯涌出量逐渐增大,最终趋于瓦斯鉴定结果最大值;回采过程中,高抽巷钻孔瓦斯抽采最大纯量为70 m^(3)/min,低抽巷瓦斯治理措施最大抽采纯量为5.3 m^(3)/min,回采初期高抽巷瓦斯抽采效果明显。研究结果对于周围工作面安全回采具有较大的指导意义。

Xinjing coal mine is a coal and gas outburst mine,and the main gas control measures of 15028 working face during the mining period are high drainage roadway and low drainage roadway.This paper analyzes the gas emission in the early 30 days of 15028 working face,and investigates the effect of various control measures.Comprehensive analysis shows that:with the advance of mining face,gas emission increases gradually,and finally tends to the maximum value of gas identification results.In the process of mining,the maximum gas drainage pure quantity of high drainage roadway is 70 m^(3)/min,and the maximum gas drainage pure quantity of low drainage roadway is 5.3 m^(3)/min.the gas drainage effect of high drainage roadway is obvious in the early stage of mining.The research results have great guiding significance for safe mining of surrounding working face.