Study of Sealing Technology of Downward&Permeable BoreholeReport as inadecuate




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In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.Abstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.Because of the limitation of geological conditions,some seam can not use upward bore to measureAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.gas pressure,so using downward bore is essential, but coal-seam gas-pressure measure is difficult on the thisAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.conditionQixiangYu. 1992 . In order to resolve this problem, the way of -subsection and time-sharing holeAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.sealing- is propounded in this paper.by using this method, the crevice water of wall rock is blockaded effectivelyAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.and the influence of measure gas pressure by crevice water is avoided. It can provide guarantee toAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.measure gas pressure under the complicated condition.By the local practice,good effect is achieved.

KEYWORDS

crevice wate; hole-sealing;gas pressure

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Author: Zu Xiang Hu

Source: http://www.scirp.org/



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