CAJ | 학술논문

为了查明高储能岩体快速卸荷变形破坏机制，设计了锦屏大理岩岩爆试验，对岩爆试件的宏观破坏特征、声发射过程等进行研究。根据以往真三轴岩爆试验特征进行了全程和非全程试验，记录其过程及声发射特征。对比分析两者的宏观破坏特征，解释了岩爆试验的渐进破坏过程。试验结果表明：在大理岩岩爆试验中，岩石试件的宏观破坏是由表及里的；张性裂纹的出现要早于剪切裂纹，剪切裂纹搭接相邻的张性裂纹（或临空面）形成圈闭，圈闭内的岩石碎块出现剥离或以一定初速度弹射；剪切面上岩粉的存在意味着剪切裂纹萌生扩展过程伴随着大量弹性应变能的释放；与其他的岩爆分类和机制相比，岩爆渐进破坏观点能够较好地解释岩爆机制。
위료사명고저능암체쾌속사하변형파배궤제，설계료금병대리암암폭시험，대암폭시건적굉관파배특정、성발사과정등진행연구。근거이왕진삼축암폭시험특정진행료전정화비전정시험，기록기과정급성발사특정。대비분석량자적굉관파배특정，해석료암폭시험적점진파배과정。시험결과표명：재대리암암폭시험중，암석시건적굉관파배시유표급리적；장성렬문적출현요조우전절렬문，전절렬문탑접상린적장성렬문（혹림공면）형성권폐，권폐내적암석쇄괴출현박리혹이일정초속도탄사；전절면상암분적존재의미착전절렬문맹생확전과정반수착대량탄성응변능적석방；여기타적암폭분류화궤제상비，암폭점진파배관점능구교호지해석암폭궤제。
In order to identify the deformation and failure mechanism of rock mass with high strain energy under fast unloading condition, Jinping marble rockburst tests are designed, and the macroscopic failure characteristics and acoustic emission(AE) processes are studied. Firstly, based on previous characteristics of true triaxial rockburst tests, true triaxial rockburst tests with entire process and without entire process are done, and a detailed process and AE characteristics are analyzed. Secondly, progressive failure is explained by comparing macroscopic failure characteristics of true triaxial rockburst tests with entire process with that of true triaxial rockburst tests without entire process. Conclusions are drawn as follows:in marble rockburst test, the macroscopic failure of rock specimen varies from outside to inside;tensile cracks appear earlier than shear cracks, and isolated rock fragment, which is confined by tensile cracks (or free face) and lapping shear cracks, peels off with or without a initial speed;the phenomenon that rock powder only exists on the shear crack planes demonstrates that a considerable strain energy dissipates, accompanying expansion of shear cracks;compared with other classification and mechanism of rockburst, a progressive failure view of rockburst in this article explains rockburst mechanism reasonably.