| 上海城市水网地区电火花震源地震探测隐伏断裂的应用探索 |
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| 引用本文： | 宋春华,施刚,巫虹,张浩,郁飞.上海城市水网地区电火花震源地震探测隐伏断裂的应用探索[J].地质力学学报,2021,27(6):938-948. |
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| 作者姓名： | 宋春华 施刚 巫虹 张浩 郁飞 |
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| 作者单位： | 1.上海市地矿工程勘察院, 上海 200072 |
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| 基金项目： | 上海市财政重点项目—上海市区域地壳稳定性调查与研究（20-45064） |
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| 摘 要： | 人工地震勘探是目前公认最为有效的城市地区隐伏断裂探测手段之一，但其受限于激发震源和城市高干扰环境背景，在高度城市化区域往往难以获取良好的地震勘探资料。文章通过利用上海市城市水网发育的优势，在大治河水域开展大功率电火花震源激发方式的地震探测，对电火花震源激发能量、放电水深、不同震源的地震成像效果等对比试验，获得了上海地区内河水域（大治河东段）最佳地震勘探激发参数，确认了在城市水网开展电火花震源激发地震勘探方式的有效性。与其他常规激发方式相比，电火花激发地震勘探资料具有较高的信噪比，并且可以达到较深的勘探深度，对城市地区隐伏断裂探测具有良好效果。
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| 关 键 词： | 城市水网 大功率电火花震源 地震勘探 隐伏断裂 不同震源对比 激发能量 地震时间剖面 |
| 收稿时间： | 2020/7/1 0:00:00 |
| 修稿时间： | 2020/12/23 0:00:00 |
Application of seismic detection by spark source for concealed faults in Shanghai urban water network area |
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| SONG Chunhu,SHI Gang,WU Hong,ZHANG Hao,YU Fei.Application of seismic detection by spark source for concealed faults in Shanghai urban water network area[J].Journal of Geomechanics,2021,27(6):938-948. |
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| Authors: | SONG Chunhu SHI Gang WU Hong ZHANG Hao YU Fei |
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| Institution: | 1.Shanghai Institute of Geological Engineering Exploration, Shanghai 200072, China2.State Key Laboratory of Maring Geology, Tongji University, Shanghai 200092, China |
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| Abstract: | Nowadays artificial seismic exploration is recognized as one of the most effective means to detect hidden faults in urban areas. However, good seismic exploration data in highly urbanized areas is often unavailable limited by the excitation source and strong interference. In this paper, a seismic detection of excitation mode of high-power spark source was carried out in the Dazhi River area, in view of the developed urban water network in Shanghai. We did comparison tests on elements such as energy excitation of spark source, water depth of discharge and seismic imaging effects of different sources, and obtained the best excitation parameters for seismic exploration in inland river areas (east section of Dazhi River) in Shanghai. The validity of seismic exploration by spark source in urban water network is confirmed. Compared with other conventional excitation methods, EDM seismic exploration data has higher signal-to-noise ratio and can reach a deeper exploration depth, which helps to get good results from the detection of hidden faults in urban areas. |
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| Keywords: | urban water network high-power spark source seismic exploration concealed fault comparison of different sources energy excitation profile of seismic time |
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