Coal Engineering ›› 2020, Vol. 52 ›› Issue (11): 75-78.doi: 10.11799/ce202011015

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Application of Directional Long Bore Gas Extraction Technology in Strip Pre-Extraction

  

  • Received:2019-06-17 Revised:2019-10-23 Online:2020-11-16 Published:2020-12-16

Abstract: In order to solve the problem of large-scale gas pre-drilling and drilling engineering, low extraction concentration and long extraction time, the directional long-hole gas drainage technology is applied to the strip pre-extraction of Yushutian Coal Mine. The research shows that the length of single hole in the coal seam of Yushutian Coal Mine can reach 723m, the proportion of coal seam hole is as high as 96%~100%; the concentration of daily gas drainage is 73.8%, and the maximum daily extraction volume is 23017 m3/d; Orientation Long Hole Gas Drainage Technology The coal seam has a high proportion of holes and a fast extraction speed, which can achieve the regional elimination measures. This study provides a reference for gas control and gas utilization of mines and adjacent mines.

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