岩石强度衰减、流变与围岩稳定性分析

Analysis on the strength attenuation, rheological behavior and stableness of surrounding rock

根据岩石强度随时间里指数函数衰减,流变随时间里指数函数递增,以及岩石的全应力—应变曲线所包络的应变能守恒原理,推导建立了新的流变数学力学模型,并与实验、现场实测成果有较好的拟合性。该模型用来分析围岩稳定性是有实用意义的,在理论上提供一种新的分析方法。

Based on the principles that thestrength and rheologic behaviorprogressively vary with time according to exponential function and the strain energyenveloped in the stress-strain curves keepsconstant, a new rheological mathematicalmechanical model was inferred and estab-lished. It fits the result of laboratory andfield measurements quite well. The model ispractically significant in analysing thestableness of surrounding rock and offers anew method for theoretical analysis.