爆炸破碎区坚硬岩石动力模型及其数值模拟方法

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Abstract The modified C. C. Grigorian model was introduced to investigate the dynamic deformations of hard rock near explosion cavity after wavefront，the equations under high pressure and the incremental constitutive equations were presented. The dynamic responses of coupled-charge rock near explosion cavity under high confining pressure were calculated by introducing user-defined subroutine based on the LS-DYNA9703D secondary development platform，and the calculation results were compared with other results of experiment，elastic model or PSEUDO_TENSOR model. The results indicated that the calculation results of modified C. C. Grigorian model were in good agreement with the results derived from the similar experiment；and the modified C. C. Grigorian model was reasonable to investigate the dynamic deformation and fracture of hard rock near explosion cavity under high confining pressure after wavefront. Due to the softening effects of cracked rock，the permanent displacements of explosion cavity that calculated by using modified C. C. Grigorian model were obvious different from those based on elastic model and PSEUDO_TENSOR model，and the velocity attenuation of surface medium of explosion cavity after wavefront was in good agreement with those of experiment. The permanent displacements after expansion of explosion cavity were greatly affected by the values of confining pressure，and the higher the confining pressure was，the lower the permanent displacement was. The permanent displacements after expansion of explosion cavity were sensitive to the relaxation characteristic time.

Key words： rock mechanics underground explosion hard rock dynamic model numerical simulation user-defined subroutine

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	Articles by authors
	CHEN Wanxiang1
	WANG Mingyang2
	QIAN Yuehong2
	FANG Yingguang1
	WU Hao2

Cite this article:

CHEN Wanxiang1,WANG Mingyang2,QIAN Yuehong2, et al. DYNAMIC MODEL AND NUMERICAL SIMULATION FOR HARD ROCK NEAR EXPLOSION CAVITY[J]. , 2012, 31(S1): 3091-3097.

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https://rockmech.whrsm.ac.cn/EN/Y2012/V31/IS1/3091

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