煤层高压注水在综采放顶煤工作面的应用

Application of High-pressure Water Injection in Coal Seam at Fully Mechanized Caving Face

在中硬煤层中实施放顶煤开采时,对煤层打钻进行高压注水,软化煤质后回采率明显提高。文章对煤层高压注水前后的回采率对比,以及对如何打钻和注水时间的确定进行了阐述。

When the fully mechanized caving mining is put into practice in the medium hard coal seam,the high-pressure water injection is carried out,the coal nature is softened,the recovery rate is significantly raised.In the paper,the contrast of recovery rate around high-pressure water injection in coal seam,how to drill,and the determination of water injection time are expounded.