阳煤矿区15号煤开采中关键层对初采瓦斯的影响

基于阳煤矿区15号煤层因开采深度和强度增加,初采期工作面瓦斯突出的问题,依据砌体梁理论与关键层理论分析了上覆岩层破坏对工作面瓦斯涌出量的影响,提出了采用初采瓦斯治理巷的技术方法,并在工程现场对15号煤层工作面初采期瓦斯进行工程试验治理,对瓦斯抽放量和工作面瓦斯涌出量进行监测。结果表明：综放面采用初采瓦斯处理巷,可及时有效地排放占初采期86.25%~90.29%的上临近层瓦斯,降低了风排瓦斯量,消除了初采期瓦斯超限隐患,实现了安全、高效生产。

No. 15 Coal Seam of Yangmei Mining Area Key Seam Influence on Initial Mining Gas

Based on the increasing mining depth and strength of No. 15 coal seam in Yangmei mining area, with gas outburst in initial mining working face, according to masonry beam theory and key seam theory, overburden destruction influence on working face gas emission was analyzed, initial mining gas control roadway was put forward, No. 15 coal seam working face initial mining gas engineering experiment was done on site, gas drainage volume and working face gas emission were monitored. The result showed that fully mechanized caving face with initial mining gas control roadway could discharge in a timely and effective manner of mining in the early stage 86.25% ~ 90.29% of the adjacent layers gas,reduce the wind gas drainage quantity, eliminate hidden trouble of gas transfinite, realize safe and efficient production.