巷道围岩强度弱化规律及其应用  

Law of Rock Strength Weakening Around Roadway and Its Application

作　　者：张农[1] 侯朝炯[1] 杨米加[2] 贺永年 

机构地区：[1]中国矿业大学采矿工程系 [2]中国矿业大学建筑工程学院

出　　处：《中国矿业大学学报》1999年第2期133-135,共3页Journal of China University of Mining & Technology

基　　金：煤炭科学基金

摘　　要：认为软岩巷道稳定性应采用动态支护的观点分析．用巷道周边位移表达的损伤因子来描述围岩阶段性变形特征及破坏过程，分析与之对应的围岩强度弱化规律，在此基础上提出了喷锚注分阶段加固技术，并对合理滞后注浆时间的确定进行了研究．最后。The stability of soft rock roadway should be analyzed in the view of dynamic supporting. Damage factor expressed in the displacement of roadway wall is used to describe the characteristic of stage deformation of surrounding rock of roadways and its damage process. And the corresponding regularity of rock strength weakening is investigated. Based on the above, a staged reinforcement technology of shotcreting bolting grouting for greatly deformed softrock roadways is put forward, and the rational opportunity of delayed grouting is discussed. Finally, an engineering example is given.

关 键 词：巷道 岩石强度 损伤因子 分阶段加固 弱化规律 

分 类 号：TD313.3[矿业工程—矿井建设] TD353