采矿与安全工程学报2011，Vol.28Issue(4)：585-588,4.
基于雁型裂纹模型的高地应力巷道劈裂破坏机理分析
Analysis on the Splitting Failure Mechanism of High-Stress Roadway Based on Echelon Crack Model
摘要
Abstract
The splitting failure mechanism of the roadway under high-stress is studied in this paper, based on the echelon crack model. By using the stress intensity factor theory, we analyze the stress intensity factor and principal stress in crack tip of echelon branch, and obtain the criterion of splitting failure in the high-stress roadway by Hoek-Brown rock failure criterion. In addition, the criterion is programmed into FISH language and embedded into FALC software, and the splitting failure zone of surrounding rock is calculated. The results show that the longer the length of echelon crack is, the larger the splitting failure area is formed. When the echelon crack length is relatively long, the difference between the depth of splitting fracture zone and depth of plastic fracture zone is large. Furthermore, the depth of splitting fracture zone calculated by empirical formula is close to the result of numerical simulation, which indicates that the splitting failure criterion proposed in this paper can provide reference for the stability evaluation and support design of high-stress roadway.关键词
高地应力巷道/应力强度因子/雁型裂纹/劈裂破坏Key words
high-stress roadway/stress intensity factor/echelon crack/ splitting failure分类
矿业与冶金引用本文复制引用
浦海,聂韬译..基于雁型裂纹模型的高地应力巷道劈裂破坏机理分析[J].采矿与安全工程学报,2011,28(4):585-588,4.基金项目
国家自然科学青年基金项目(50904065) （50904065）
教育部新世纪优秀人才支持计划项目(NCET-09-0728) （NCET-09-0728）
教育部博士点新教师基金项目(20090095120007) （20090095120007）
江苏省高校"青蓝工程"项目 （）
中国矿业大学中央高校基本科研业务费专项资金项目. （）
