摘要
针对底抽巷瓦斯抽采中存在的问题,提出了在抽放钻孔施工完成后进行高压水力扩孔的方法,通过高压水的切割和冲刷作用使钻孔内部空间增大,在地应力的自然作用下,煤体产生新的裂隙,提高煤层透气性,从而提高底抽巷抽放钻孔后期的抽放效果,达到防治煤与瓦斯突出的目的。
Aiming at the problems existing in the bottom alley pumping gas extraction,and it was put forward that implementing high pressure hydraulic broaching after the completion of the drainage borehole,so the internal space of borehole increases through the cutting and scouring function of high pressure water, under the action of the in-situ stress, the new cracks appear and develop in natural coal body, and the permeability of coal seam is improved,the late drainage effects of gas drainage boreholes in floor drainage roadway was improved, and has achieved the goal of prevention and control of coal and gas outburst.
出处
《中州煤炭》
2015年第7期30-32,79,共4页
Zhongzhou Coal
关键词
水力扩孔
瓦斯抽放
防治煤与瓦斯突出
hydraulic broaching
gas drainage
coal and gas outburst prevention
