Study on the long-distance gas pre-drainage technology in the heading face by directional long borehole

HIGHLIGHTS

• who: Yunbing Hou et al. from the School of Energy and Mining Engineering, China University of Mining and Technology-Beijing have published the research: Study on the Long-Distance Gas Pre-Drainage Technology in the Heading Face by Directional Long Borehole, in the Journal: Energies 2022, 15, 6304. of /2022/
• what: The research shows that coal seam permeability k can be expressed as an exponential function related to effective stress : k=k0 exp -3C f ∆σe where k0 is the initial permeability, m2; Cf represents cleat volume compressibility, MPa-1; ∆σe is effective stress variation . . .
  

   

  

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