3102掘进工作面瓦斯突出危险性预测及分析

The Prediction and Analysis of Gas Outburst Potential on 3102 Heading Face

在3102巷掘进过程中,工作面瓦斯涌出量较大,达到0.2%～0.3%,致使回风流瓦斯体积分数超过0.5%,巷道瓦斯涌出量超过了3m3/min。同时在探水过程中,经常发生卡钻现象,致使探水工作无法达到预计的长度。针对这种情况,对3102掘进工作面采用单顶指标法和综合指标法来鉴定该煤层是否具有瓦斯突出危险性。

In the heading process of 3102 road-way,the gas emission rate of the heading face is bigger（up to 0.2%～0.3%）,making the mass fraction of return gas exceed 0.5% and the gas emission rate in roadway exceed 3 m3/min.At the same time,in the process of water exploration,the drill jamming phenomenon often occurs,which causes that the water exploration can＇t reach the expected length.In the light of such situations,the single indicator method and the aggregative indicator method are adopted by 3102 heading face to identify whether the coal seam has the gas outburst potential.