摘要
煤岩体变形和强度以及流体在多孔隙裂隙煤中的渗流规律,是高瓦斯煤层开采中关注的问题。阐述了高瓦斯煤力学介质属性、微结构模型、渗透特性及其孔裂隙和破碎块度的分形特征;利用电液伺服岩石力学试验系统,以数控瞬态渗透法进行了煤样全应力应变过程的电液伺服试验,研究了全应力应变过程中煤样渗透性的变化特征。试验结果显示:煤样的力学性能与其微结构和微孔隙特征密切相关,渗透率变化与试样内部裂隙发展变化过程密切相关。
The coal deformation, density and fluid penetrating regularity in multi-fractures are the key problems in gas-rich coal development. The mechanical media properties, micro-structural model, permeability, and fractal characteristics of porous cracks and fragmentation of gas-rich coal-rocks are discussed. Electro-hydraulic servo tests of complete stress-strain process of coal samples are conducted by using the electro-hydraulic servo controlled rock mechanics testing system and the numerically controlled transient permeability method. The varying charac- teristics of coal sample permeability are studied. The tests reveal that the mechanical properties of coal are related to micro-structure, micro-porosity property, and the permeability is related to fractures variation.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2008年第4期8-11,共4页
Coal Geology & Exploration
基金
国家自然科学基金项目(50574072)
国家自然科学基金重点项目(50534049)
国家重大基础研究发展计划(973计划)项目(2005CB221500)
关键词
高瓦斯煤
全应力应变
渗透率-应变方程
煤的渗透性
gas-rich coal
complete stress-strain
permeability-strain equation
permeability of coal
