Analyses of In-situ Measurements of Gas Emission and Gas Pressure in Pre-drainage Boreholes in Coal Seams.

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Other Title
  • 炭層ガス抜孔におけるガス湧出量・ガス圧の実測結果の解析
  • タンソウ ガス ヌキコウ ニ オケル ガス ユウシュツリョウ ガスアツ ノ ジ

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Abstract

The pre-drainage of methane gas from coal seams is adopted in cases where high emissions during development of headings and at the longwall result in stoppages at the face, or in seams where outbursts of gas and coal endanger workers and materials. The authors have proposed the approximate calculation method of unsteady gas pressure distribution in coal seams and gas emission into boreholes in cases of pre-drainage of gas. The paper shows some analyses of in-situ data with this C-function method.

Journal

  • Shigen-to-Sozai

    Shigen-to-Sozai 109 (5), 331-335, 1993

    The Mining and Materials Processing Institute of Japan

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