平煤八矿瓦斯抽采钻孔一注式封孔参数研究

摘要

针对瓦斯抽采钻孔封孔质量差，抽采浓度低的问题，提出在平煤八矿试验一注式封孔装置及工艺；通过考察封孔参数和钻孔孔口瓦斯浓度之间的关系，确定了穿层钻孔抽采瓦斯变化特征，煤层顺层钻孔最佳封孔参数；研究结果对采用类似封孔装置及工艺的矿井，确定最佳封孔参数提供了参考。%On the condition of poor quality borehole sealing and low gas concentration at drainage borehole ,one-injection-type seal device and method is used in Pingdingshan NO .8 Coal Mine .By inves‐tigating the relationship between sealing parameters and gas concentration at porthole ,the characteristics of drainage gas concentration at cross rock borehole varies with time is identified .And the optimum seal‐ing parameters of drainage borehole along coal seam is deduced .This is a good example for using such borehole sealing device and method .