摘要
利用RMT-150C岩石力学试验系统与声发射监测系统对纯尾砂胶结充填体试件进行了无侧限单轴压缩实验,分析出充填体受压破坏的5个阶段,单轴抗压强度和到达极限强度的应变值,试件受压所能承受的最大应变。发现声发射活动由平静到活跃,最后又趋于平静的现象,在失稳破坏阶段声发射活动最为活跃,探究了声发射活跃的内在原因,同时分析了此阶段大能量事件产生的同时出现短期稳压状态的问题。结合应力应变研究了纯尾砂胶结充填体受压全过程的声发射特性。
Experiments on stress and strain AE characteristics of backfilling body under uniaxial compression were made using RMT-150C rock mechanics testing system and acoustic emission monitoring system, The analysis of the five-stage compression backfilling body damage was conducted and with uniaxial compressive strength and strain value with ultimate strength, the specimen under compression can sustain the maximum strain. It is found that the acoustic emission activities tend to be from quiet to active and calm in the end. The most active acoustic emission activity is in the unstable failure stage. Inherent causes for active acoustic emission were explored and the event of large energy and the emergence of short-term voltage stability condition in this stage were analyzed. The acoustic emission characteristics of backfilling body with the stress and strain of the whole process were also analyzed.
出处
《化工矿物与加工》
CAS
北大核心
2016年第8期61-63,共3页
Industrial Minerals & Processing
基金
国家自然科学基金(编号:51304083)
江西省科技支撑计划项(编号:20141BBE50005)
关键词
充填体
应力
应变
声发射
backfilling body
stress
strain
acoustic emission
作者简介
曹世荣（1993-），男，江西景德镇，在读硕士，研究生，主要从事矿山岩体稳定性分析与测试，E-mail：bugcsr@163.com。
