岩爆倾向性深部硬岩破坏行为  

Research on behavior of burst-prone hard rock at depth

作　　者：樊军伟[1] 董腾[1] 胡萍[1] 彭成[1] 

机构地区：[1]南华大学城市建设学院,湖南衡阳421001

出　　处：《矿业工程研究》2013年第2期10-15,共6页Mineral Engineering Research

摘　　要：高地应力的存在,使得深部岩体比地表浅层岩体破坏方式更加复杂,主要表现为围岩破坏由脆性破坏转化为延性破坏,甚至深部岩体大规模的开挖可能引发动力破坏,成为深部地下采矿和隧道工程中经常发生地质灾害,其预测与控制已成为工程安全的重大理论和技术课题.在对冬瓜山铜矿地质概况了解基础上,对现场巷道不同地点围岩破坏形态进行了描述,结合其受力情况对发生相应破坏的机理进行了分析,发现冬瓜山岩体破坏的几种主要形式:静态剪切破坏、弱岩爆、中等岩爆和大规模岩爆破坏.通过对岩体破坏类型的调查及破坏机理的研究及其分类,以期对深部岩体力学稳定性问题提供相应的对策.Under the influence of high ground stress, rock failure at depth is more complicated than that of at surface, showing that brittle failure transforms into ductile failure, even large -scale rock excavation could cause dynamic failure, which leads to geological disasters at underground mining and tunnel engineering. The forecast and control of these disasters have become the important theoretical and technical issues for engineering safety. Based on the study of geology survey at Dongguashan Copper Mine, rock failures at different sites around roadway are depicted, and failure mechanisms are also analyzed respectively. It is found that the types of rock failure at Dongguashan Copper Mine are divided into four catalogues as below, i.e. shear failure, minor rock burst, moderate rock burst and major rock burst. Through the work in this paper, effective support measures for rock failure in hard rock at depth are expected to be put forward.

关 键 词：岩爆 硬岩 剪切破坏 破坏机理 微震 

分 类 号：TD325[矿业工程—矿井建设]