煤矿安全2017，Vol.48Issue(8)：1-4,4.DOI:10.13347/j.cnki.mkaq.2017.08.001
采动力学特征下含瓦斯煤渗流实验研究
Seepage Experimental Study on Coal Containing Gas Under Mining-induced Mechanical Characteristics
摘要
Abstract
To study the mining-induced mechanical characteristics influence on the permeability of coal,seepage experiment and theoretical analysis are adopted.The permeability experiments of two groups of coal samples from two mines are implemented to reveal the permeability variation regularity under two mining stress distribution.The results are shown as follows:the curve of permeability has the similar change under two mining stress distribution,but the characteristics of permeability are different under the different phases of paths;in the process of quasi-hydrostatic pressure,the permeability under two mining stress distribution decreases with the increasing of initial axial force.On the whole,the permeability under protective coal mining stress distribution is higher than that under top-coal mining stress distribution.In the second loading and unloading phase,the permeability shows a slow upward trend under top-coal mining stress distribution,the unloading confining pressure plays a dominant role on the change of permeability coefficient of coal,but the permeability under protective coal mining stress distribution begins to increase at the end of loading and unloading process;the coal permeability distribution can be divided into slow increase stage,growth stage and rapid increase stage in the forward process of working face.The effect of gas drainage is more ideal,especially after the peak stress points near the working face.关键词
采动应力/含瓦斯煤/渗流实验/渗透率/瓦斯抽采/时空规律Key words
mining stress/coal containing gas/seepage experiment/permeability/gas drainage/spatial distribution and temporal variation分类
矿业与冶金引用本文复制引用
范鹏宏,聂百胜..采动力学特征下含瓦斯煤渗流实验研究[J].煤矿安全,2017,48(8):1-4,4.基金项目
国家重点研发计划资助项目(2016YFC060708-1) （2016YFC060708-1）
国家自然科学基金资助项目(51374216) （51374216）
