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A testing system to understand rock fracturing processes induced by different dynamic disturbances under true triaxial compression

引用

Journal of Rock Mechanics and Geotechnical Engineering 2023年第1期15卷 102-118页

作者： Xia-Ting Feng Mian Tian Chengxiang Yang Benguo He Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines Northeastern UniversityShenyang110819China

In this context,a testing system to understand rock fracturing processes induced by different dynamic disturbances under true triaxial compression was *** system is mainly composed of a static loading subsystem,a dynamic loading subsystem,a specimen box subsystem,and a data measurement *** static loading subsystem uses low stiffness loss frame structure technology,which greatly improves the frame stiffness in the three principal stress directions(up to 20 GN/m)and ensures the demand of the disturbance experiment in both the prepeak and postpeak *** disturbance loads with frequency of 0e20 Hz and stress level of 0e30 MPa were applied using large flow parallel oil source technology characterized with high heat dissipation *** the disturbance loads with frequency of 100e500 Hz and stress level of 0e30 MPa,they were realized by using high-frequency and centimeter-per-second-scale low-speed disturbance rod *** rigid self-stabilizing specimen boxes were utilized to provide support for the specimen and deformation sensors,ensuring the stability and accuracy of the data *** verify the performance of the true triaxial test system,disturbance experiments were conducted on granite *** results show that the experimental device satisfies the requirements of original design,with an excellent repeatability and reliable testing results.

关键词： Low-frequency and low-amplitude full surface disturbance true triaxial system Prepeak and postpeak dynamic disturbance Rockburst-induced stress wave Blasting-induced stress wave Hard rock

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