大直径钻孔在突出煤层大采长工作面的应用

Application of Large Diameter Borehole in Large Long Working Face of Protruding Coal Seam

寺家庄公司是典型的煤与瓦斯突出矿井,主采的15号煤层透气性系数偏低,针对综采工作面回采期间瓦斯涌出量大、瓦斯治理难度大等问题,对15号煤层大直径钻孔模型、抽采效果进行研究分析,改进钻机抽采设备,提出大直径钻孔瓦斯抽采技术治理工作面瓦斯,取得了明显的瓦斯治理效果。

Sijiazhuang company is a typical coal and gas outburst mine,the permeability coefficient of the No.15 coal seam is low,aiming at the problems of large amount of gas emission and difficulty of gas control in fully mechanized face,this paper studies and analyzes the large diameter drilling hole model and gas drainage effect of the No.15 coal seam,improves the drilling machine gas drainage equipment,puts forward the large diameter drilling hole gas drainage technology to control the face gas,and obtains the obvious gas control effect.