doi:10.16186/j.cnki.1673-9787.2021030018

Received:2021/03/03

Revised:2021/06/29

Published:2022/07/15

Research on high-efficiency gas drainage technology of drilling,hydraulic punching,hole protection integration hydraulic pressure relief screen pipe protection hole

XU Yanpeng1,2, YANG Wanli2, LI Haitao3, WU Xinwen4, WANG Binrong4, ZHANG Hao4

1.Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization， Jiaozuo  454000 ， Henan， China;2.College of Safety Science and Engineering， Henan Polytechnic University， Jiaozuo  454000 ， Henan， China;3.Shanxi Changping Mining Group Co. ， Ltd. ， Jincheng  048000 ， Shanxi， China;4.Baiyangling Coal Mine， China Coal Xiyang Energy Co. ， Ltd. ， Jinzhong  045300 ， Shanxi， China

Abstract: In order to solve the problems of serious hole collapse and low drainage efficiency when drilling hydraulically along the bed,the technology of integration of drilling , hydraulic punching and hole protection was developed, which integrated hydraulic cavity making technology and screen pipe protection while drilling, and the drilling,hydraulic punching ,hole protection integration device were developed. The drilling of gas drainage boreholes along the coal seam , hydraulic cavitation and installation of screens while drilling were realized. Field tests showed that the screen installation depth of the drilling, hydraulic punching and hole protection integration technology was 98% , which was 2.18 times that of the original hydraulic cavitation technology and 1.96 times that of ordinary drilling. The average gas drainage scalar volume of the borehole was 0.258 m³/min , which was 1.8 times that of the original hydraulic cavitation technology and 4.86 times that of ordinary boreholes. The gas flow attenuation coefficient of the borehole was 0. 016 d ^-1 ， which was 19.4% of the original hydraulic cavitation technology and 50% of the ordinary borehole. The technology of drilling and protecting integration improved the installation depth of screen pipe， slowed down the gas attenuation and effectively improved the efficiency of gas extraction.

Key words:high gas coal seam;gas drainage;drilling along the bed;hydraulic cave-making;integrated drilling，flushing and protection;drilling and hole protection

钻冲护一体化水力卸压筛管护孔瓦斯高效抽采技术研究_许彦鹏.pdf