摘要
针对戊9-20180工作面具有突出危险性但不具备开采保护层条件、地质条件复杂的问题,在掘进期间至回采前,采取了在进、回风巷内对采面圈定煤体经过水力压裂增透后沿戊9煤层施工本煤层抽放钻孔进行采前预抽的措施。结果表明,经过钻孔抽放瓦斯后,钻孔控制范围内的煤层残余瓦斯含量降到了8 m3/t以下,控制了煤与瓦斯突出灾害的发生。
Aiming at E9-20180 working face being of outburst hazard,lacking of protective seam mining conditions,and in complex geological conditions,the borehole and gas drainage were carried out along E9 seam at mining face in intake and return airways during the period of excavating and stopping.After hydraulic fracturing and permeability enhancing,the gas pre-drainage was performed on E9 seam.The results showed that the residual gas content in the seam decreased below 8 m3/t after gas drainage,and the coal and gas outburst hazard was avoided.
出处
《中国煤炭》
北大核心
2011年第5期105-107,共3页
China Coal
