高边墙地下洞室洞壁围岩板裂化实例及其力学分析

An Example of Slab-Rending in the Surrounding Rock of Underground Excavation with High Walls and Its Mechanical Analysis

本文用鲁布格电站地下厂房边墙围岩开裂为例,讨论了板裂介质岩体力学的一个新领域,即高边墙地下洞室在高地应力作用下板裂化引起的围岩破坏和变形问题,它对研究地下洞室稳定性,岩体改造和变形监测反分析等将有新的启示。

A new problem in rock mass mechanics, namely slab strip failure and defor-mation caused by slab-rending of surrounding rock, is discussed in this paper andthe authors give an example of Lubuge Power Station, Where the slab-rending ofsurrounding rock in the underground power house's walls takes place.The study ofthis problem plays an important role in the study of the stability of undergroundexcavation, the reinforcement of rock mass, the back analysis of mechanical pa-rameters of rock mass in terms of deformation monitoring data and so on, andthere will be a great inspiration to the study of rock mass mechanics. A brief description of geology and project of Lubuge Power Station is givenfirstly. An arch-strip model and its assumptions which illustrate the slab-rendingsurrounding rock mass are then discussed. In the end, the deformation, stability,slabbing of the slab-rent surrounding rock mass are studied.