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针对金川Ⅲ矿区硐室围岩蠕变控制问题,通过对破碎工程系统中大件道工程围岩变形的监测发现有明显的流变特性,即包括急剧变形、减速变形以及变形趋于稳定的三个阶段.分析了围岩应力环境、矿物成分和地下水对硐室围岩变形的影响,提出了适合高地应力构造影响带围岩流变模型,并对流变参数作了分析.根据金川岩体流变过程是由弹性、塑性、黏弹性和黏塑性等多种变形共存的一个复杂过程,呈现出高度的非线性的特征,从理论上分析二次支护的最佳时机,即金川Ⅲ矿区深部岩体在开挖并进行一次支护后的第3周内可作为最佳的二次支护时机,允许变形量应控制在50～150 mm.
Aiming at the creep control problem of the surrounding rock in Jinchuan Ⅲ mine area, it is found that there are obvious rheological characteristics by monitoring the deformation of the surrounding rock of the large-scale project in the crushing engineering system, that is, including the drastic deformation, decelerating deformation and the deformation three This paper analyzes the influence of surrounding rock stress environment, mineral composition and groundwater on the deformation of the surrounding rock of the cavern, puts forward the rheological model suitable for the surrounding rock of the influence zone with high geostress and analyzes the rheological parameters.According to the Jinchuan rock flow The process of transformation is a complex process of coexistence of many deformations, such as elasticity, plasticity, viscoelasticity and viscoplasticity, which shows a highly nonlinear characteristic. The optimal timing of secondary support is theoretically analyzed, that is, the deep The rock mass can be used as the best second support time within the first 3 weeks after excavation and once support. The allowable deformation should be controlled within 50 ~ 150 mm.