Abstract:The generation and evolution of zonal disintegration are analyzed by means of numerical simulation. Based on maximum tensile stress criterion and strain energy density theory,the element failure criteria have been developed in terms of mesoscopic level. Then the elastic damage mechanics is considered to simulate the failure behavior of rock. In the specific numerical modeling process,the released energy caused by the excavation of underground workings must be large enough to bring about dynamic phenomenon of the surrounding rock. In other words,the excavation process can be considered as dynamic process. Based on the above concepts,the zonal disintegration code has been developed by the FISH of FLAC3D. Then it was used to determine the failure pattern of the rock mass around the deep roadways and the quantity and width of the zonal disintegration also have been obtained. The results of numerical simulation are in good agreement with the in-situ monitoring results.
钱七虎. 深部岩体工程响应的特征科学现象及“深部”的界定[J]. 华东理工学院学报:自然科学版,2004,27(1):1-5.(QIAN Qihu. The characteristic scientific phenomena of engineering response to deep rock mass and the implication of deepness[J]. Journal of East China Institute of Technology:Natural Science,2004,27(1):1-5.(in Chinese))
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