|
Abstract: |
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.condition(QixiangYu. 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.
|