基于块体理论赤平投影法的1#泄洪洞围岩稳定性分析

Stability Analyses on Surrounding Rock Mass of the Spillway Tunnel No.1 Based on Block Theory by Stereographic Projection Method

在地质调查和围岩勘察资料的基础上,运用块体理论赤平投影法,分析了1#泄洪洞围岩的稳定性。对各种块体的有限性和可动性进行了判别,并对可动块体体积进行计算,得出可动块体的空间分布以及与断层相关可动块体分布的直观统计结果,划出1#泄洪洞围岩的关键区域,并提出支护对策。

With stereographic projection method for block theory,this paper deals with the stability of the spillway tunnel No.1 on the basis of geology investigation and data of rock mass. It makes judgments on the blocks of limitation and mobility, and calculates the volume of the movable blocks. The obvious statistical results are obtained that space distribution of the movable blocks and the distribution of the movable blocks which is relation to fault. On this base, the key region of the spillway tunnel No.1 is pulled out and the supporting scheme is given.