论文部分内容阅读
为研究动态孔隙水作用下砂岩的力学特性,采用MTS815.02型电液伺服岩石力学试验系统和PCI-2声发射测试系统,对砂岩进行不同孔隙水压下的三轴压缩声发射试验,分析不同孔隙水压下砂岩的强度、变形及声发射信号特征.研究表明:在孔隙水压作用下,岩样的破坏形式大多为劈裂破坏.随着孔隙水压力的增加,砂岩的抗压强度和弹性模量明显降低,在达到应力峰值时的声发射信号峰值减小,应力峰值附近声发射信号突增明显.
In order to study the mechanical properties of sandstone under the action of dynamic pore water, the triaxial compression acoustic emission test of sandstone under different pore pressures was carried out using MTS815.02 electro-hydraulic servo rock mechanics test system and PCI-2 acoustic emission test system The results show that under the action of pore water pressure, most of the failure modes of rock samples are splitting failure.With the increase of pore water pressure, the compressive strength of sandstone And elastic modulus decreased significantly, reaching the peak value of the peak acoustic emission signal decreases, the sudden increase in acoustic emission signal near the peak value.