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xia jie fang ceng gong zuo mian kai cai de wa si yong chu yu chu li
Author(s): 
Pages: 1-5+65
Year: Issue:  1
Journal: Safety in Coal Mines

Keyword:  瓦斯涌出工作面开采采空区瓦斯漏风汇卸压抽放卸压瓦斯风量计算开采下解放层采空区漏风煤层;
Abstract: 本文介绍了开采下解放层瓦斯涌出的规律,即瓦斯在放顶、周期来压、底鼓时期的涌出规律;采空区瓦斯涌出分布也有与采空区漏风带分布相似的三个带;工作面瓦斯浓度随风量增大和减小而增加并在其间有较低值的规律;减少瓦斯超限而采取的措施,即限量瓦斯风量计算法、瓦斯预抽、卸压抽放、尾巷石门排放、漏风汇排放等措施。
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