School of Resources and Safety Engineering,China University of Mining and Technology( Beiing)

为了提高豫北煤田红岭煤矿本煤层瓦斯抽采效率,进而保证矿井的安全生产和顺利接替,根据矿井的煤层赋存规律和瓦斯地质条件,提出了本煤层水力扩孔技术,搭建了本煤层水力扩孔系统,优选了相关试验设备,确定了合理的工艺流程和技术参数,进行了试验效果考察。现场工业试验结果表明:水力扩孔影响范围内抽采钻孔的瓦斯流量衰减系数明显下降,钻孔月瓦斯抽采量为普通抽采钻孔的2.17倍,本煤层水力扩孔技术不仅使得钻孔抽采作用面积增大,钻孔周围一定范围内煤体卸压增透,而且可以增加钻孔瓦斯抽采影响半径,有效提高钻孔瓦斯抽采效果,减少顺层钻孔施工量,缩短瓦斯抽采达标时间。

In order to improve the gas drainage efficiency of the mining seam in Hongling Mine of Yubei Coalfield and to ensure the safety production and successful r eplacement of the mine,according to the seam deposition law and gas geological condition of the mine,a hydraulic reaming technology of the mining seam was provided,a hydraulic reaming system of the mining seam was established,the related test equipment was optimized, the rational technical process and technical parameters were deter mined and the test effect investigation was conducted. The site industrial test results showed that the attenuation coefficient of the gas flow from the gas drainage borehole within the reaming influence scope was reduced obviously and the month gas drainage volume from the borehole was 2. 17 times higher than the conventional drainage bo rehole. The hydraulic reaming technology of the mining seam could make the borehole gas drainage action area increased,could make the pressure releasing and permeab ility improving of the seam within certain scope of the borehole surrounding area and increase the gas drainage influence radius of borehole ,effectively improve the gas dra inage effect of the borehole,reduce the borehole construction value along the mining seam and reduce the target time of gas drainage.

国家自然科学基金资助项目(51474219,51304213,51174212)；高等学校博士学科点专项科研基金博导类资助项目(20120023110006)；中国矿业大学煤炭资源与安全开采国家重点实验室开放基金资助项目(SKLCRSM13KFB08)；