Theoretical Investigation of Gas Pressure Distribution around a Borehole and Flow Rate

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  • ボアホール周辺のガスの圧力分布および流量に関する理論的研究
  • ボアホール シュウヘン ノ ガス ノ アツリョク ブンプ オヨビ リュウリョウ

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Abstract

Solutions of the gas flow equation are of particular importance in gas control in coal mines. From this point of view the authors carried out the calculations of pressure distribution around a borehole and gas flow rate into the hole, using the implicit form of the finite difference equation. Also, as an application of the results of the calculation a method is proposed for measuring apparent permeability of coal seam in situ.

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