溶蚀作用下岩盐塑性力学模型研究

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Abstract Through analysis of mechanism of variation for rock salt mechanical properties with dissolving effect，rock salt plastic mechanical model with dissolving effect has been established. The analysis results show that mechanism of variation for rock salt mechanical properties with dissolving effect is because that macro- mechanical parameters of rock salt，such as cohesion，have been varied with dissolving effect；but rock salt failure mechanism has been unchanged essentially. With strain harding-softing model which can be used to reasonably describe rock salt mechanical behavior，rock salt plastic mechanical model without dissolving effect has been established；and associated with the conventional triaxial compression test results，the expressions between cohesion and internal friction angle without dissolving effect and equivalent plastic strain have been obtained. Based on mechanism of variation for rock salt mechanical properties with dissolving effect and rock salt plastic mechanical model without dissolving effect，and under the premise that with dissolving effect，the value of cohesion has been changed，the rock salt plastic mechanical model with dissolving effect has been established. At last，based on the uniaxial compression meso-mechanical test results of rock salt with coupled stress-dissolving effect，the variation rule of cohesion on dissolving phase with dissolving time is calculated by combined FLAC-Genetic Algorithms. The formula of cohesion on reloading phase after dissolving is obtained；and the variation rule of cohesion of rock salt plastic mechanical model with dissolving effect has also been obtained.

Key words： rock mechanics rock salt dissolving effect plastic mechanical model cohesion

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	TANG Yanchun1
	2
	ZHOU Hui1

Cite this article:

TANG Yanchun1,2,ZHOU Hui1. STUDY OF PLASTIC MECHANICAL MODEL OF ROCK SALT WITH DISSOLVING EFFECT[J]. , 2012, 31(S1): 3031-3037.

URL:

https://rockmech.whrsm.ac.cn/EN/Y2012/V31/IS1/3031

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