防灾减灾工程学报2017，Vol.37Issue(6)：871-877,7.DOI:10.13409/j.cnki.jdpme.2017.06.003
温度-应力联合作用下的不稳定岩块稳定性分析
Temperature and Stress Combined Effect on the Unstable Rock Block Stability Analysis
摘要
Abstract
One of the important factors for collapse of thin and unstable rock block is temperature in the areas with large temperature difference.This paper will consider the effect of stability on unstable rock block under the combination of temperature and stress.Firstly,calculating the temperature transfer in x and y direction respectively on the basis of the heat transfer method,and then establishing the computing method of temperature stress in temperature field and master structure plane of unstable rock mass by using superposition principle.Considering the combination of temperature stress,the unstable rock mass weight,earthquake and fissure water pressure,we established the calculation method of stress intensity factor of the master structure plane of unstable rock mass based on fracture mechanics,and then according to combination stress intensity factor of the master structure plane of unstable rock mass and fracture toughness to construct the stability analysis method of unstable rock mass.The comparative analysis shows that temperature stress has a significant influence on stability of thin and unstable rock mass.At the beginning of temperature rising,the stability coefficient of unstable rock mass decreases quickly,and with the temperature rising further,the stability coefficient of unstable rock mass changes slowly,which reveals the stability variation law of unstable rock block under the combined action of temperature and the perforation's length of master control structure plane.The stability coefficient compute method of unstable rock mass in this paper can provide new approach to stability analysis of thin and unstable rock block in large temperature difference areas.关键词
不稳定岩块/稳定性/温度/应力/传热学/断裂力学Key words
unstable rock block/stability/temperature/stress/heat transfer/fracture mechanics分类
天文与地球科学引用本文复制引用
王林峰,唐红梅,陈洪凯,叶四桥,唐芬..温度-应力联合作用下的不稳定岩块稳定性分析[J].防灾减灾工程学报,2017,37(6):871-877,7.基金项目
国家自然科学基金项目(51408084,51378521,51678097)、重庆市教委2014年度科学技术研究项目(KJ1400317)、重庆交通大学校内科学基金课题项目(2013kjc043)资助 （51408084,51378521,51678097）
