中文摘要：

针对软岩巷道围岩破坏性强、难支护的特性,提出了软岩巷道二次合理支护时间的确定方法,用于指导工程实践。从岩石应力-应变关系、蠕变过程、长期强度和能量耗散的角度进行软岩巷道的流变破坏机理分析。采用圆形断面巷道及西原模型,结合弹性力学基本解与西原模型本构关系,引入损伤变量,应用拉普拉斯变换及逆变换,并求导得到围岩变形速率方程。通过蠕变试验结合最小二乘法拟合或者位移反分析法求出蠕变参数,进而确定软岩巷道围岩二次合理支护时间,对于地下支护理论设计具有一定的指导意义。

英文摘要：

To the characters of broken heavily and difficulty supporting about surrounding rock of soft rock roadway, then the method of the secondly rational supporting time of soft rock roadway were put forward, and applied in field. The rheology broken principle of soft rock roadway were studied from rock stress-strain relation, creep process, longtime strength and energy release and so on. Round roadway section and Xiyuan model were adopted, with basic solution of elastic mechanics and constitutive relation of Xiyuan model,and damage variable was drawn into, Laplace transformation and inverse transformation was applied, then surrounding rock deformation speed ratio was obtained. Creep parameters was derived out on the basis of creep experiment results with least-squares fitting or displacement back analysis method, then the secondly rational supporting time of soft rock roadway was confirmed, it could reference for underground supporting theory.