高地应力围岩分区碎裂化的时间效应分析和相关参数研究  

TIME EFFECT ANALYSIS OF ZONAL DISINTEGRATION OF HIGH IN-SITU STRESS SURROUNDING ROCKS AND STUDY OF RELEVANT PARAMETERS BASED ON THE CREEP INSTABILITY THEORY

作　　者：李英杰[1] 潘一山[1] 章梦涛[1] 

机构地区：[1]辽宁工程技术大学力学与工程科学系,辽宁阜新123000

出　　处：《地质力学学报》2006年第2期252-260,共9页Journal of Geomechanics

基　　金：国家自然科学基金重大项目(50490275)资助

摘　　要：本文阐述了高地应力围岩分区碎裂化现象的形成需要经过一定的时间,但这段时间不会很长;采用蠕变理论对岩石分区碎裂化的时间效应进行了分析;推导了能够描述加速蠕变阶段的流变模型—改进的西原模型的本构方程和蠕变方程,在此基础上求出了岩石分区碎裂化发生时破裂带半径(破碎带距巷道中心的距离)的公式。It takes some time to form the phenomenon of zonal disintegration of surrounding rocks with high in situ stress, but the time needed is not too long. The creep theory is used to analyze the time effect of zonal disintegration of rocks and deduce the constitutive equation and creep equation of the improved Nishibara theological model which can describe the third （accelerated） creep stage. On that basis, we can find the fracture zone radius （the distance from the fracture zone to the center of a tunnel） formula during the zonal disintegration of rocks.

关 键 词：岩石分区碎裂化 蠕变失稳 时间效应 高地应力 

分 类 号：P584[天文地球—岩石学]