The measurement method is demonstrated valid in outburst elimination by the examination of remnant gas pressure, pre-drainage rate and the zonal verification during the coal roadway driving.
残余瓦斯压力和预抽率的检验以及煤巷掘进期间的区域验证，均证明按该方法布置的预抽钻孔，消突效果有效。
The hole enlargement by high - pressure water jet provided a feasible technical way for raising gas drainage effect from coal seam in low permeability and improving the effect of outburst pre...
高压水射流扩孔为提高低透气性煤层的瓦斯抽放效果和扩大防突措施的效果提供了一个可行的技术途径。
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