• 首页 | 期刊简介 | 编委会 | 投稿须知 | 下载专区 | 联系我们 | English
三点弯曲岩石试样的微震和电荷感应信号变化规律
The signals change regulation of microseismic and charge induction of rocks on three-point bending tests
投稿时间: 2017-03-30  最后修改时间: 2017-05-12
DOI:
中文关键词:  三点弯曲试验,微震,电荷感应
英文关键词:three-point bending experiment, microseismic, charge induction
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
赵扬锋 辽宁工程技术大学 zhyf_20010284@sina.com 
刘力强 中国地震局地质研究所  
张寅 辽宁工程技术大学  
摘要点击次数: 84
全文下载次数: 
中文摘要:
      利用微震和电荷感应同步监测试验系统,通过三点弯曲试验研究了脆性岩石变形破裂过程的微震和电荷感应信号的变化规律。实验结果表明:在三点弯曲试验中,预制裂纹试样破坏路线从预制裂纹点开始,基本沿着竖直线向上破裂,而对于完整试样起裂点在中心点,破裂路径偏离竖直线。试样在破裂发展阶段微震和电荷感应信号强度远大于线弹性阶段微震和电荷感应信号强度。试样在破裂发展阶段产生的微震和电荷感应信号持续时间也较大。完整试样变形破裂过程产生的微震和电荷感应信号强度比预制裂纹试样的大且事件数也多,预制裂纹试样出现前兆信号时间也较晚。三点弯曲试验中试样变形破裂过程产生的微震和电荷感应信号事件数明显比压缩破裂时少。利用微震和电荷感应信号在岩石变形破裂过程的不同阶段相似性和差异性,对微震和电荷感应信号综合分析能更有效监测三点弯时脆性岩石的变形破裂过程,更准确获得岩石失稳破坏的前兆信息。
英文摘要:
      According to microseismic and charge induction synchronous comprehensive monitoring devices, signal characteristics of microseismic and charge induction which the deformation and failure process of brittle rock produce in three-point bending experiment is studied. The experimental results show that in three-point bending experiment, pre-crack failure route starts from crack, along the vertical line to rupture, and for the complete sample initiation point is in the center point of the sample, crack path deviation of vertical. The signal intensity of microseismic and charge induction in the failure stage is far greater than that in the linear elastic stage. The signals duration of microseismic and charge induction in the failure stage is longer. The signal intensity of microseismic and charge induction in the intact specimen deformation and fracture process is greater than the signal intensity of the pre-crack specimen, and the events of microseismic and charge induction is more, the precursory signal time of the pre-cracked specimen is late. The events of microseismic and charge induction during deformation and fracture process in the three-point bending test is less than that in the compression fracture test. Using the microseismic and charge induction signal similarities and differences in the different stage of the rock deformation and fracture process, the comprehensive analysis of the microseismic and charge induction signal can be more effective in monitoring three-point bending deformation and failure process of brittle rock, and the precursory information of rock failure can be accurately obtained.
查看全文  查看/发表评论  下载PDF阅读器
关闭

版权所有:《实验力学》编辑部
您是本站第 1575668 位访问者,今日一共访问96次,当前在线人数: 69
技术支持:本系统由北京勤云科技发展有限公司设计