GAS FLOW AROUND A BOREHOLE IN A COAL BED AND ITS APPROXIMATE EXPRESSIONS - 1. THE CASE OF A BOREHOLE WITHIN A BOUNDED CIRCULAR AREA.

HIDEFUMI OMUTA, RYUICHI ITOI, KEN GOTOH

Research output: Contribution to journalArticle

Abstract

THIS PAPER PRESENTS AN EASY METHOD FOR CALCULATING BOTH THEAPPROXIMATE DISTRIBUTION OF GAS PRESSURE AND THE GAS FLOW RATE THROUGH A BOREHOLE WITH A BOUNDED CIRCULAR AREA UNDER CONSIDERATION OF ABSORBED GAS. IT WAS FOUND THAT THE GAS DRAINAGE PERIOD IS LONGER IF ABSORBED GAS WAS TAKEN INTO ACCOUNT AND A LARGER BOREHOLE CANNOT SHORTEN THE PERIOD SO MUCH. THESHORTENING OF BOREHOLES INTERVAL IS MORE EFFECTIVE FOR THE PURPOSE. IN JAPANESE WITH ENGLISH ABSTRACT.

Original languageEnglish
Pages (from-to)21-28
Number of pages8
JournalNihon Kogyokaishi
VolumeV 98
Issue numberN 1127
Publication statusPublished - Jan 1982
Externally publishedYes

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Boreholes
Flow of gases
Coal
Gases
Drainage
Flow rate

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

GAS FLOW AROUND A BOREHOLE IN A COAL BED AND ITS APPROXIMATE EXPRESSIONS - 1. THE CASE OF A BOREHOLE WITHIN A BOUNDED CIRCULAR AREA. / OMUTA, HIDEFUMI; ITOI, RYUICHI; GOTOH, KEN.

In: Nihon Kogyokaishi, Vol. V 98, No. N 1127, 01.1982, p. 21-28.

Research output: Contribution to journalArticle

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abstract = "THIS PAPER PRESENTS AN EASY METHOD FOR CALCULATING BOTH THEAPPROXIMATE DISTRIBUTION OF GAS PRESSURE AND THE GAS FLOW RATE THROUGH A BOREHOLE WITH A BOUNDED CIRCULAR AREA UNDER CONSIDERATION OF ABSORBED GAS. IT WAS FOUND THAT THE GAS DRAINAGE PERIOD IS LONGER IF ABSORBED GAS WAS TAKEN INTO ACCOUNT AND A LARGER BOREHOLE CANNOT SHORTEN THE PERIOD SO MUCH. THESHORTENING OF BOREHOLES INTERVAL IS MORE EFFECTIVE FOR THE PURPOSE. IN JAPANESE WITH ENGLISH ABSTRACT.",
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