摘要
在TAW-2000岩石伺服试验机上进行了煤岩全应力-应变过程中的渗透性试验,概化出岩石的一般应力-应变-渗透曲线,阐述了变形破坏过程中裂隙岩体渗透系数变化规律及裂隙发育趋势。将贯通裂隙岩样及普通岩样对比研究表明:两种类型岩样渗透系数变化规律存在差异,主要表现在残余强度阶段,普通岩样在残余强度阶段渗透系数急剧下降,而贯通裂隙岩样渗透系数在残余强度阶段继续增加。综合分析试验结果,渗透系数变化受多种因素综合影响,其中岩体结构特征对岩体渗透系数变化规律影响较大。
The permeability test of coal rock in the complete stress-strain process is carried out on the TAW-2000 rock servo testing machine.The normal stress-strain-permeability curve is generalized.The law of penetrability coefficient changes and the trend of fracture development of the fissured rock during the process of deformation and failure are expatiated.Comparative study of penetrative fissure rock samples and common rock samples shows that there are differences between them in the laws of penetrability coefficient changes,mainly expressed in the residual strength stage.The penetrability coefficient of common rock samples decreases sharply,while that of penetrative fissure rock samples increases continuously.Comprehensive analysis result shows that the permeability coefficient is influenced by many factors,among which the structure characteristics of rock mass is the significant one.
出处
《中国煤炭》
北大核心
2013年第7期39-42,125,共5页
China Coal
基金
国家自然科学基金资助项目(40802062):矿井底板裂隙岩体充水致灾机理研究
中央高校基本科研业务费资助(3142013100)
关键词
裂隙岩体
岩体结构
全应力应变
渗透系数
导水敏感性
fissured rock
rock structure
complete stress-strain
permeability coefficient
water-conducting sensitivity
