煤矿安全2017，Vol.48Issue(8)：5-8,12,5.DOI:10.13347/j.cnki.mkaq.2017.08.002
卸压瓦斯抽采遮挡层存在性及其作用
Existence of Barrier Layer of Pressure Relief Gas Extraction and Its Role
摘要
Abstract
We discuss the model of action and mechanism of special water-resisting key strata,a barrier layer in pressure relief gas extraction,and propose the typical structure for barrier layer.The results show that the barrier layer is a special form of water-resisting key strata.According to the relative position of barrier layer and protected coal seam and their position in the "three zones" of overburden rock,four stratigraphic structures of the barrier layer are divided.Further,the gas flow pattern is obtained,and there are four kinds of mechanisms of barrier layer to control the gas flow pattern.They are the compression of displacement and deformation of rock strata under the action of superimposed stress,the expansion and block effect of weak lithologic and minerals,the filling function of fluid carrying material,the fracture intensity.关键词
遮挡层/地层结构/卸压瓦斯抽采/导气裂隙通道/保护层开采Key words
barrier layer/stratigraphic structure/pressure relief gas extraction/fractured channel for gas/protected coal seam mining分类
矿业与冶金引用本文复制引用
杨景芬,徐宏杰,黄华州..卸压瓦斯抽采遮挡层存在性及其作用[J].煤矿安全,2017,48(8):5-8,12,5.基金项目
国家自然科学基金资助项目(41402140,41302129) （41402140,41302129）
安徽省自然科学基金资助项目(1408085QE88) （1408085QE88）
