Research on forced gas draining from coal seams by surface well drilling

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表面钻在 Luling 煤矿被执行,在 Huaibei,到弄短为煤气的排干要求的时期。试验性的学习被设计由高效地从上面的保护的层排干气体减少煤气的控制的费用。结构的提讯和经由表面钻的压力地势的技术原则被讨论。从试用的结果显示出在 10 个月的一个时期上从表面系统排干的那气体。全部的数量镇定气体是 2.484 亿 m3。排干的气体发生在三个阶段:一个生长时期;最大的煤气的生产的一个时期;并且一个变细时期。最大的煤气的生产的时期持续了 4 个月。在期间这次,甲烷集中从 60% ~ 90%,平均排干率是 10.
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