摘要
以CO2气体为介质,运用自制含气岩石力学试验系统对平顶山煤业集团一矿砂岩全应力-应变过程中的气体渗透特性、围压对砂岩渗透特性的影响进行了实验研究.试验结果表明:全应力-应变过程中砂岩渗透率变化具有明显的阶段性,且应变滞后性明显;峰后砂岩渗透率明显大于其起始渗透率;随着围压的增加,相同应变下砂岩试件的渗透率呈减小趋势,砂岩渗透率的变化率也趋于减小.
All of the experimental study on gaseous seepage properties, the effect on gaseous seepage properties caused by confining pressure were done by the self-made gas-bearing rock mechanics testing system with CO2. The results show that permeability change of sandstone in complete stress-strain process has evident stage characteristic and strain hysteretic nature; permeability of sandstone during the post-peaking phase is evidently larger than initial permeability of sandstone; permeability of sandstone decreases at the same strain as the confining pressure is increased, and permeability change gradient decreases, too.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2009年第8期1063-1066,共4页
Journal of China Coal Society
基金
平顶山煤业集团2006年科研计划资助项目(平煤[2006]108)
关键词
砂岩
全应力-应变
渗透特性
CO2
围压
sandstone
complete stress-strain process
seepage property
CO2
confining pressure
