摘要
为解决高瓦斯单一厚煤层综放开采条件下采空区瓦斯涌出引起的工作面瓦斯超限难题,针对分源预测法未提及的综放工作面瓦斯涌出公式进行研究,发现其与综采工作面相比多出顶煤瓦斯涌出这一特性。以岩石力学、流体力学、渗流力学等理论为基础,结合现场试验对顶煤瓦斯运移及积聚规律进行研究,最后得出综放工作面顶煤煤壁与直接顶所围成的悬空区域瓦斯积聚现象较严重,且由进风巷至回风巷方向,瓦斯浓度逐渐增大。
In order to solve the problem of gas emission from the working face caused by the gas emission from the goaf in the fully mechanized caving mining under the condition of single thick coal seam with high gas,in this paper,the formula of gas emission in fully mechanized top coal caving face,which is not mentioned in the source prediction method,is studied.It is found that the gas emission of the top coal gas is higher than that of the fully mechanized working face.Based on the theory of rock mechanics,fluid mechanics and seepage mechanics,gas migration and accumulation of top coal is studied in combination with field test,finally,it is concluded that the gas accumulation in the top coal seam of fully mechanized top coal caving face and the immediate roof is more serious,and the direction of air intake to the return air lane,the gas concentration increases gradually.
作者
邓春生
DENG Chunsheng(China Coal Technology and Engineering Group Shenyattg Research. Institute, Fushun 113122, China)
出处
《煤矿安全》
北大核心
2017年第12期21-24,共4页
Safety in Coal Mines
关键词
单一厚煤层
综放工作面
顶煤瓦斯涌出
瓦斯运移
瓦斯积聚
single thick coal seam
fully mechanized caving face
top coal gas emission
gas migration
gas accumulation
