基于声发射能量判定指标岩石破坏时刻预测研究  

Study on failure time prediction of rock based on acoustic emission energy judging index

作　　者：宋璐璐[1] 赵志刚[1] 贾志闯 高成章[1] 

机构地区：[1]山东科技大学矿业与安全工程学院,山东青岛266590

出　　处：《煤炭工程》2016年第9期117-119,共3页Coal Engineering

基　　金：国家自然科学基金(51174129)

摘　　要：利用岩石声发射技术对岩石试件进行单轴全过程加载实验,获得岩石声发射时间-能量参数,提出一个新指标——能量判定指标KSN,并对岩石试件破坏时刻进行预测。在实验结果的基础上,利用MATLAB绘制声发射能量拟合直线ySN,并对能量判定指标KSN进行计算。研究表明,按照一定时间序列进行分段的基础上,随着岩石试件不断加载,与前一个时间段相比,能量判定指标KSN减小,幅度逐渐增大;当能量判定指标KSN增大时,能量拟合直线ySN出现回弹现象,预示试件即将破坏。能量判定指标KSN分析方法也可用于地震、矿震的预测。In order to obtain rock acoustic emission time-energy parameters,uniaxial whole process loading experiment is carried out on rock sample based on rock acoustic emission technology. Energy judging index KSNis proposed to predict the failure time of rock sample. According to the experimental results,MATLAB is used to draw acoustic emission energy fitting line ySNand the energy judging index KSNis calculated. The results show that,with the load of rock sample,the trend of energy judging index KSNis decreased compared with the previous period. As the lapse of time,the trend becomes more and more obvious. When the trend of energy judging index KSNincreased,the rebound phenomenon of energy fitting line ySNappears. It foreshows that the failure of rock sample is coming soon. Analysis method of energy judging index KSN can also be used to forecast earthquake and mine earthquake.

关 键 词：声发射 能量判定指标 回弹现象 岩石破坏时刻 

分 类 号：TD315[矿业工程—矿井建设]