深部岩体分区破裂化现象数值模拟

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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.

Key words： rock mechanics deep rock mass engineering zonal disintegration phenomenon elastic damage dynamic problem

Received: 10 February 2011

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https://rockmech.whrsm.ac.cn/EN/Y2011/V30/I7/1337

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