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- Title
Gas Pre-Drainage Technology of Ground Multi-Branch Horizontal Well Connected with Underground Mine Borehole.
- Authors
LI Feng-qi; QIAO Wei; NIU Guo-bin; YANG Sheng-qiang; JIANG Chun-lin
- 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.
- Publication
Coal Science & Technology (0253-2336), 2014, Vol 42, Issue 5, p48
- ISSN
0253-2336
- Publication type
Article
- DOI
10.13199/j.cnki.cst.2014.05.013