Gas Pre-Drainage Technology of Ground Multi-Branch Horizontal Well Connected with Underground Mine Borehole
LI Fengqi
QIAO Wei
NIU Guobin
YANG Shengqiang
JIANG Chunlin
Abstract：According to the problem of time and space limitations when gas pre-drainage through underground mine borehole and ground multi-branch horizontal well,the gas pre-drainage technology of ground multi-branch horizontal well connected with underground mine borehole was put forward,and it was used in multi-branch horizontal connection well engineering of No. 24307 working face Shaqu Mine. After connection,the gas production rate of gas drainage borehole XC01 was 6 000~7 000 m3/d and the average gas concentration was 95%;the gas production rate of gas drainage borehole XC02 was around 12 000 m3/d and the average gas concentration was 91. 05%.The gas production of single well and gas drainage ratio grew significantly.
Keywords：ground multi-branch horizontal wellpinnate wellunderground mine boreholegas pre-drainage
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 48-50,54 )