黑龙江科技学院学报2016，Vol.26Issue(6)：606-611,6.DOI:10.3969/j.issn.2095-7262.2016.06.004
固-热-气耦合作用下含瓦斯低透煤的渗流规律
Study on seepage law underlying low-permeability gas-bearing coal under coupling of solid-thermal-gas
摘要
Abstract
This paper is focused on the prevention and control of coal and gas outburst disasters.The research consists of a systematic analysis of the effect of different temperature field,main stress field,gas pressure and unloading speed on the seepage characteristics of gas-bearing coal using solid-thermal-gas coupling true three axis device;a consequent development of the relationship between permeability and its qualitative and quantitative relationship;and a deeper analysis of the variation law behind the permeability of gas-bearing coal under various unloading paths.The results indicate that the gas permeability of gas-bearing coal exhibits change tendency of negative index,as is conditioned by a decrease in temperature and horizontal stress before and after unloading which has a gradually decreasing effect on permeability;along with an increasing gas pressure comes a "V" font change in permeability,suggesting a small amount of the variation in loading and unloading permeability;when subjected to different pressure relief velocity,the permeability remains unchanged if it is loaded;and when loaded,the permeability of gasbearing coal shows a change trend of Gauss function,along with an increase in pressure relief velocity,representing the four different zones:the reduction zone,the stable growth area,the deceleration growth zone and the stable region.The comprehensive analysis provides a quantitative formula behind unloading coal sample permeability under complex stress path.关键词
瓦斯/渗流/卸载速度/固-热-气耦合/真三轴Key words
gas/seepage/unloading velocity/coupling of solid-thermal-gas/true three axis分类
矿业与冶金引用本文复制引用
刘刚,肖福坤,于涵,侯志远,赵荣欣,庞建宝..固-热-气耦合作用下含瓦斯低透煤的渗流规律[J].黑龙江科技学院学报,2016,26(6):606-611,6.基金项目
国家自然科学基金项目(51574115 （）
51374097 （）
51604100) （）
