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基于三维快速扫描算法与到时差数据库技术的层状介质震源定位方法研究
引用本文:郭超,高永涛,吴顺川,成子桥,张诗淮,韩龙强. 基于三维快速扫描算法与到时差数据库技术的层状介质震源定位方法研究[J]. 岩土力学, 2019, 40(3): 1229-1238. DOI: 10.16285/j.rsm.2017.2048
作者姓名:郭超  高永涛  吴顺川  成子桥  张诗淮  韩龙强
作者单位:1. 北京科技大学 金属矿山高效开采与安全教育部重点实验室,北京 100083;2. 昆明理工大学 国土资源工程学院,云南 昆明 650093;3. 中电建路桥集团有限公司,北京 100044
基金项目:国家自然科学基金项目(No.51774020)
摘    要:

关 键 词:微震定位  快速扫描法  到时差  数据库  层状速度模型
收稿时间:2017-09-18

Research of micro-seismic source location method in layered velocity medium based on 3D fast sweeping algorithm and arrival time differences database technique
GUO Chao,GAO Yong-tao,WU Shun-chuan,CHENG Zi-qiao,ZHANG Shi-huai,HAN Long-qiang. Research of micro-seismic source location method in layered velocity medium based on 3D fast sweeping algorithm and arrival time differences database technique[J]. Rock and Soil Mechanics, 2019, 40(3): 1229-1238. DOI: 10.16285/j.rsm.2017.2048
Authors:GUO Chao  GAO Yong-tao  WU Shun-chuan  CHENG Zi-qiao  ZHANG Shi-huai  HAN Long-qiang
Affiliation:1. Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine, University of Science and Technology Beijing, Beijing 100083, China; 2. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China;3. PowerChina Roadbridge Group Co., Ltd., Beijing 100044, China
Abstract:The velocity model is the major factor affecting the seismic source localization algorithm which is the core of microseismic monitoring technique. Based on the complex velocity model, the fast sweeping method (FSM) is an algorithm to calculate the first arrival time of the seismic wave by using the eikonal equation. This method has been widely applied in the fields of earthquake localization and geophysical exploration. In this study, this method was introduced in the field of microseismic monitoring in geotechnical engineering. Especially for layered velocity models, a fast localization technique was established based on the fast sweeping method (FSM). Firstly, the fast sweeping method (FSM) in a 3D Cartesian coordinate system was proposed to calculate the initial travel time of the point source in the single velocity model and horizontal layered velocity model. Compared with the theoretical solution, the accuracy of the algorithm and its error distribution characteristics were analyzed. The travel time results calculated by the fast sweeping method (FSM) and theoretical solutions were compared to analyze the algorithm precision and error distribution characteristics. Secondly, a rapid seismic source localization technique was put forward for the layered velocity model based on the database of the arrival time differences which were calculated by fast sweeping method (FSM). Finally, the positioning accuracy and computational efficiency between the new localization technique and traditional method based on the isotropy velocity model were compared and analyzed. This study showed that the proposed technique for the layered velocity model presented a favorable accuracy and computational efficiency, and also reduced the location time significantly compared with traditional location methods. The technique can provide significant theoretical and technical support for the microseismic source localization in complex layer and acoustic emission monitoring in the laboratory.
Keywords:microseismic source location  fast sweeping method  arrival time difference  database  layered velocity model  
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