不同加卸载路径下岩爆岩体的损伤特性试验研究

o studying on the rock burst mechanism under different stress environment and the influenced on rock internal damage characteristic, the rock burst experiments of specimen under different stress was conducted by using the independent development rock burst experimental device, as the same time, the acoustic test and elastic wave CT technology applied before and after experiment. Studies had shown that, internal damage characteristic of the specimen before and after experiment could reflect directly by using the elastic wave CT imaging, and the loading paths have huge impact on failure characteristic and internal damage characteristic. The expansion phenomenon near the loading surface obviously presented on the specimen like cavity 'V' on the condition of higher unloading pressure stress environment, while, that obviously presented spelling on the lower unloading condition. The specimen internal has large degree of damage as it on the higher unloading condition.