高应力条件下深部巷道变形和破坏特征分析

The Analysis of the Deformation and Failure Characteristics of Deep Roadway under the High Stress Force

摘要: 高应力是深部巷道在开挖时所必然遇到的现实客观情况，深部岩石在高应力情况下会出现分区破裂化现象。通过FLAC3D数值模拟软件，模拟分析了深部巷道在复杂应力场下的脆延转换、分区破裂化等新的现象，同时也研究了埋深以及软化模量对深部巷道的影响。研究结果表明：500米埋深是深部巷道稳定应力变化的临界条件，低于500米时，稳定应力随着深度的增加而降低；大于500米时，稳定应力随着深度的增加而增加。

Abstract: High stress is the reality and the inevitable situation that deep roadway meets when being mined, and the rock will appear the phenomenon of zonal disintegration. The new phenomena of brittle ductile transition and zonal disintegration of deep roadway are simulated and analyzed by FLAC3D software under the complex stress field. At the same time, the softening modulus influence on deep mine roadway is also studied. The research results show that: 500 meters depth is the critical condition of deep roadway steady stress changes. Less than 500 meters, stable stress decreases with the increase of depth. More than 500 meters, stable stress increases with the increase of depth.