重庆大学学报：自然科学版2012，Vol.35Issue(1)：110-116,7.
阶段性循环载荷对突出煤样渗透特性的影响
Effect of outburst coal＇s gas seepage properties under stage cyclic loading
摘要
Abstract
Experiments of outburst coal＇s gas seepage and deformation under cyclic loading of the stationary gas pressure and different confining pressures are made by ＂fluid-solid-heat coupling with axis servo seepage system of coal＂. The results show that loading route has a significant effect on mechanical properties of coal sample. Although the complete stress-strain curves and one cyclic loading curve present similarity in the overall trend, the stress peak value of coal sample under cyclic loading is lower. Under cyclic loading, the stress strain curves during loading and unloading don＇t overlap. They connect to form a hysteretic loop. The permeability is in close relation with the damage deformation process of coal sample. Under cyclic loading, permeability is increasing during the unloading and decreasing during the loading. The permeability-strain curves during loading and unloading form a hysteretic loop, which is corresponding with the hysteretic loop of stress-strain curves of coal sample.关键词
岩石力学/型煤/循环荷载/瓦斯渗流/力学特性/固气耦合三轴试验Key words
rock mechanics/coal sample/cyclic loading/gas seepage/mechanical properties/gassy coal THM coupling system分类
数理科学引用本文复制引用
李晓泉,尹光志,蒋长宝,蔡波..阶段性循环载荷对突出煤样渗透特性的影响[J].重庆大学学报：自然科学版,2012,35(1):110-116,7.基金项目
国家重点基础研究发展计划（973计划）资助项目 （）
国家自然科学基金资助项目 （）
中央高校基本科研业务费资助项目 （）
重庆大学“211工程”三期创新人才培养计划建设项目 （）
