Showing 1 - 7 results of 7 for search '"extraction pressure"', query time: 0.68s Refine Results
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6

    Test of roof interception directional drilling for close distance coal seam group gas control in Qidong Coal Mine by ZHANG Chaoju1, FANG Jun2, YANG Yali1, WANG Xian2, YANG Xiaoji1

    Published 2021-11-01
    Subjects: “…close distance coal seam group; gas control; gas extraction; roof interception directional drilling; borehole extraction; pressure maintaining sealed coring; composite directional drilling…”
    Get full text
    Article
  7. 7