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| Study on the physical meaning of seismic inhomogeneous degree by rock fracture experiments | |
| 引用本文： | 李志雄,马胜利,李圣强,李闽峰,路鹏,陈华静,王松,吴婷. Study on the physical meaning of seismic inhomogeneous degree by rock fracture experiments[J]. 地震学报(英文版), 2005, 18(6): 732-740. DOI: 10.1007/s11589-005-0101-1 |
| 作者姓名： | 李志雄 马胜利 李圣强 李闽峰 路鹏 陈华静 王松 吴婷 |
| 作者单位： | Institute of Earthquake Science China Earthquake Administration Beijing 100036 China，State Key Laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration Beijing 100029 China，Institute of Earthquake Science China Earthquake Administration Beijing 100036 China，Institute of Earthquake Science China Earthquake Administration Beijing 100036 China，College of Disaster Prevention Techniques Yanjiao 065201 China，China Seismic Network Center Beijing 100036 China，China Seismic Network Center Beijing 100036 China，Institute of Earthquake Science China Earthquake Administration Beijing 100036 China |
| 基金项目： | The MOST (2004BA601B01). |
| 摘 要： | Introduction The study of acoustic emission evidenced by rock fracture experiments is the most important field of seismology. By means of the rock fracture technique system, many researchers tried to prove the possible relationship between some parameters such as b value and the stress variation prior to rock fracture using the acoustic emission results from different types of rock fracture ex-periments (MA et al, 2004a, b; Lockner, 1993; JIANG and ZHANG, 1998). In order to investigate th… |
| 收稿时间： | 2005-02-24 |
Study on the physical meaning of seismic inhomogeneous degree by rock fracture experiments |
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| LI Zhi-xiong,MA Sheng-li,LI Sheng-qiang,LI Min-feng,LU Peng,CHEN Hua-jing,WANG Song,WU Ting. Study on the physical meaning of seismic inhomogeneous degree by rock fracture experiments[J]. Acta Seismologica Sinica(English Edition), 2005, 18(6): 732-740. DOI: 10.1007/s11589-005-0101-1 | |
| Authors: | LI Zhi-xiong MA Sheng-li LI Sheng-qiang LI Min-feng LU Peng CHEN Hua-jing WANG Song WU Ting |
| Affiliation: | 1. Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China 2. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China 3. College of Disaster Prevention Techniques, Yanjiao 065201, China 4. China Seismic Network Center, Beijing 100036, China |
| Abstract: | It is observed that the parameter of seismic inhomogeneous degree (GL value) calculated from the earthquake catalog shows obvious abnormal changes prior to strong earthquakes, indicating the state change of local seismic activity. This paper focuses on the mechanism for the abnormal changes of the GL values based on the sequences of acoustic emission for three types of rock samples containing macro-asperity fracture; compressional en-echelon fracture and model-III shear fracture. The results show that for the three types of rock samples, there are continuous abnormal changes of GL value (>1) just before the non-elastic deformation occurs or during the process of nucleation prior to the instability. Based on the experimental results, it seems that the process of creep sliding and resistance-uniformization along fault zone is the possible mechanism for the abnormal changes of GL value before rock fractures. |
| Keywords: | seismic inhomogeneous degree rock fracture experiment acoustic emission non-elastic change earthquake prediction |
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