Design of an active-source seismic detection system based on illumination analysis and migration imaging experiments: considering the Zhuxi mining area as an example
Li Wen, Chen Yong*, Xu Shan-Hui, Hu Jiu-Peng, Liu Bao-Jin, Ouyang Yong-Peng,He Yin-Juan, Tan Ya-Li, Hua Xin-Sheng, Qin Jing-Jing, Li Qian, and Jia Jia
1. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210008, China
2. Geophysical Exploration Center, China Earthquake Administration, Zhengzhou 450002, China
3. Key laboratory of Seismic Observation and Geophysical Imaging, Institute of Geophysics, China Earthquake Administration, Beijing 100081, China
4. The Tenth Geological Brigade of Jiangxi Geological Bureau, Yingtan 335000, China
Abstract：
The purpose of this paper is to discuss the feasibility of utilizing the non-explosive source green seismic exploration technology to detect mineral resources in the deep of complex mountainous areas of western and southern China as well as to provide a feasible detection scheme. Based on seismic illumination analysis and prestack depth-domain migration experiments, a viable active-source seismic detection system was designed for the Zhuxi mining area of Jingdezhen. Geophysical models were established according to the combined drilling profile of L42 and the corresponding petrophysical measurements of rocks based on geological findings, drilling results, and site investigations. Since the single-component p-wave seismometers would be primarily utilized for the subsequent seismic data acquisition, the viscous-acoustic wave equation was selected to simulate the propagation of the seismic wave. Meanwhile, the acoustic-elastic boundary approach (AEA) was used to solve the irregular free-surface problem caused by the rugged Earth’s surface. Seismic source-receivers bidirectional illumination analysis and prestack depth-domain reverse time migration experiments were performed on simulated seismic data with 20 dB high SNR (signal-to-noise ratio) and 6 dB low SNR, respectively. The results of this study showed that by adopting a dense exciting-receiving seismic detection system, the eco-friendly non-explosive seismic source technology could reveal the spatial distribution of the main strata underneath the target area and the ore-controlling structures like faults and overthrust nappes. Based on this study, the next step of seismic data acquisition was implemented. The first-hand non-explosive source seismic profiles of the Zhuxi mining area demonstrated that the detection scheme designed was feasible and effective. By constantly improving the technical system, the eco-friendly non-explosive active-source technology would provide a safe and efficient approach, which could be used in the research fields of deep mineral resource prospection, buried faults exploration, urban underground space detection, etc. Finally, the proposed design and demonstration of an active-source seismic detection system based on illumination analysis and migration experiments merits further study and applications.
Key words：
收稿日期: 2020-05-28;
基金资助:This work was supported by the National Natural Science Foundation of China (Nos. 62175100 and 41790463), the National Key R&D Program of China (No. 2018YFC1503200), the Spark Program of Earthquake Sciences of CEA (No. XH22015A), the Special Fund of the Institute of Geophysics, China Earthquake Administration (No. DQJB19B25)
通讯作者: Chen Yong, male, academician of China Scientific Academy, mainly engaged in petrophysics, geophysics, and seismology research (Email: yongchen@nju.edu.cn).
E-mail: yongchen@nju.edu.cn
作者简介: First Author: LI Wen, Senior Engineer, a postdoctoral fellow at Nanjing University, mainly studying active-source seismic technology, seismic detection system design, and seismic exploration data processing
(Email: liwen_work@163.com).
*Corresponding author: Chen Yong, Academician of China Scientific Academy, mainly engaged in the study of petrophysics, geophysics, and seismology
(Email: yongchen@nju.edu.cn).
. Design of an active-source seismic detection system based on illumination analysis and migration imaging experiments: considering the Zhuxi mining area as an example[J]. APPLIED GEOPHYSICS, 2024, 21(1): 93-107.
2024, Vol. 21 
