GAS FLOW AROUND A BOREHOLE IN A COAL BED AND ITS APPROXIMATE EXPRESSIONS. 2ND REPORT: THE CASE OF A BOREHOLE WITHIN A BOUNDED RECTANGULAR AREA.

Ken Gotoh, Ryuichi Itoi, Hidefumi Omuta

Research output: Contribution to journalArticle

Abstract

This paper deals with the problem of gas drainage by a borehole within a bounded rectangular area under consideration of absorbed methane gas. The gas pressure distribution at dimensionless time, T, which is calculated by the Finite Element Method, shows the combined pattern of radial flow near the borehole and linear flow in the outer area. The approximate expression method by use of the gas pressure gradient function is useful enough for the rectangular area problem like for the circular area problem shown in the first report.

Original languageEnglish
Pages (from-to)1119-1125
Number of pages7
JournalNihon Kogyokaishi
Volume100
Issue number1162
DOIs
Publication statusPublished - Jan 1 1984

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Boreholes
Flow of gases
Coal
Gases
Radial flow
Pressure gradient
Pressure distribution
Drainage
Methane
Finite element method

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

GAS FLOW AROUND A BOREHOLE IN A COAL BED AND ITS APPROXIMATE EXPRESSIONS. 2ND REPORT : THE CASE OF A BOREHOLE WITHIN A BOUNDED RECTANGULAR AREA. / Gotoh, Ken; Itoi, Ryuichi; Omuta, Hidefumi.

In: Nihon Kogyokaishi, Vol. 100, No. 1162, 01.01.1984, p. 1119-1125.

Research output: Contribution to journalArticle

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