首页 | 官方网站   微博 | 高级检索  
     

围压下岩石破坏声发射测试系统及震级频度关系的实验研究
引用本文:焦文捷,马瑾,吴秀泉,刘力强.围压下岩石破坏声发射测试系统及震级频度关系的实验研究[J].地震地质,1991,13(1):54.
作者姓名:焦文捷  马瑾  吴秀泉  刘力强
作者单位:国家地震局地质研究所,国家地震局地质研究所,国家地震局地质研究所,国家地震局地质研究所 北京 100029,北京 100029,北京 100029,北京 100029
摘    要:震级频度关系的Gutenburg-Richter公式近年来受到了挑战,一些学者在不同条件下都发现了b值的非线性表现。本文利用自己装配的实验系统对围压下岩石破裂声发射活动的震级频度关系和时间序列特征进行了研究。实验表明AE事件的震级频度关系在某个中强震级K′之前基本符合b值规律,其b值的大小与破裂方式有关。在摩擦滑动中AE序列具有低b值的特征。从K′起震级频度关系出现明显的非线性现象。根据非线性表现的不同,可将其分为第一型和第二型两类。在AE序列中,也存在着“特征震级”的现象

关 键 词:声发射  震级频度关系  b值  特征震级

EXPERIMENTAL RESEARCH ON A NEW AE EXPERIMENTAL SYSTEM FOR MEASURRING FAILURE ROCKS UNDER CONFINING PRESSURE AND THE MAGNITUDE-FREQUENCY RELATION
Jiao Wen-jie,Ma Jin,Wu Xiu-quan and Lu Li-qiang.EXPERIMENTAL RESEARCH ON A NEW AE EXPERIMENTAL SYSTEM FOR MEASURRING FAILURE ROCKS UNDER CONFINING PRESSURE AND THE MAGNITUDE-FREQUENCY RELATION[J].Seismology and Geology,1991,13(1):54.
Authors:Jiao Wen-jie  Ma Jin  Wu Xiu-quan and Lu Li-qiang
Abstract:The Gutenburg-Richter law of magnitude-frequency relation has been challenged in recent years. Many researchers have found nonlinear sections in the magnitude-frequency relation in some cases. The magnitude-frequency relations shown in acoustic emission experiment of the rocks under confining pressures are studied in this paper.A new AE experiment system related to the confining pressure has been developed. The system can record the energy of AE events ranging from 1 to 106 in relative energy unit.Six experiments of b-value simulation related to the confining pressure were conducted. The specimens were made of granite, marble, and granodiorite with different configurations. The main results of experiments are:1.The characters of acoustic emission of rocks are very similar with those of earthquake, providing the basis of applying AE experiment for the seismological research.2.The time series of AE events is fractally distributed on the time axis and its fractal dimension is a measure of AE activity.3.The AE series has not any characteristic occurrence period. The series of large AE events accords with neither the time-predictable model nor the slip-predictable model.4.There are two types of nonlinearity of b-value in the magnitude-frequency relations of either earthquakes or AE events.5.The magnitudes of AE events are fractally distributed on the magnitude axis. In addition, some problems aboul the theoretical study on b-value and applyingthe new method to seismological research have been discussed.
Keywords:Acoustic Emission  Magnitude-recurrence relationship  b-value  Characteristic earthquake  
本文献已被 CNKI 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号