三轴压缩下砂岩裂隙演化规律研究  

Research on Evolution Laws of Cracks in Sandstone under Triaxial Compression

作　　者：杨小彬[1] 韩心星 王浩[1] 刘恩来[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤炭技术》2017年第9期3-5,共3页Coal Technology

基　　金：国家自然科学基金(50904071;51274207)

摘　　要：基于恒定围压下砂岩的三轴压缩试验,得到不同围压下的应力应变曲线。认为压缩过程中的体积应变是由基体材料的弹性体积应变和裂隙体积应变组成,通过计算得到裂隙体积应变在压缩过程中各阶段随各应力、应变的变化关系,从而得到裂隙演化规律。Based on the triaxial compression tests of sandstone under constant confining pressures, the stress-strain curves under different confining pressures were obtained. It was considered that the volumetric strain in the compression process was composed of the elastic volumetric strain of matrix materials and the volumetric strain of cracks. The variations of the volumetric strain of cracks along with stress and strain in the compression process were gained by calculation and then the evolution laws of cracks were gained.

关 键 词：三轴压缩 弹性体积应变 裂隙体积应变 

分 类 号：TD315[矿业工程—矿井建设]