摘要
应用TAW-2000D岩石三轴试验机和SDAES型数字声发射仪,以会泽铅锌矿深部矿岩为研究对象,通过单轴压缩、巴西劈裂试验,分析岩体的变形破坏特征和声发射规律;以冲击能指数WCF和岩石脆性指数B和应变能密度SED作为判别准则,对岩爆的倾向性进行研究.研究结果表明:岩爆倾向性强的岩体,声发射活动出现相对平静期,岩爆倾向性弱的岩体则没有;岩体的声发射特性与岩体的破坏模式直接相关,根据其声发射规律可预测岩爆倾向性;会泽铅锌矿深部矿岩存在中等至强烈岩爆的倾向.
Taking the deep rockmass in Huize Lead -Zinc mine as the research object, the uniaxial compressive tests and Brazilian splitting tests are carried out by using TAW -2000D rock triaxial test machine and SDAES digital acous- tic emission instrument. The rock deformation, failure characteristics and law of acoustic emission are then analyzed. The impact energy index W CF, rock brittleness index B and the strain energy density （SED） are used as the diseriminant criteria to investigate the roekburst tendency. The results show that the acoustic emission activity has a relatively quiet period for the rockmass with strong rockburst tendency. But for those rockmass whose roekburst tendency is weak, this AE quiet period does not appear. The acoustic emission characteristics are directly related to the rockmass failure mode. According to the law of acoustic emission, the rockburst tendency can be predicted. The deep rock masses in Huize Lead -Zinc mine have medium to strong roekburst tendency.
出处
《昆明理工大学学报（自然科学版）》
CAS
北大核心
2014年第1期21-25,共5页
Journal of Kunming University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(51064012
51264018)
关键词
岩爆倾向性
冲击能量指数
脆性系数
应变能密度
声发射
rockburst tendency
impact energy index
brittleness index
strain energy density
acoustic emission
