Study on reservoir-induced seismicity in Three Gorges Reservoir

Zeng, Xinxiang; Hu, Xiao; Su, Kezhong; Ting-gai, Chang; Zhu, Huangqiu

doi:10.1201/9781315116167-102

Cited by 1 publication

(3 citation statements)

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“…We prefer to classify the mechanism of human-induced seismicity in China into three types (Zhang et al, 2021). One is that the changes in the surface quality lead to the generation of earthquakes, including reservoir-induced earthquake, building-induced earthquake (Chen et al, 2008;Chen et al, 2014;Guo, 1994;Gupta, 2002;Ma et al, 2016;Qin, 1994;Yang, Yu, et al, 2019;Yu & Wu, 1996). The second is the extraction of subsurface materials leading to the generation of earthquakes, including humaninduced activities such as mining, oil and gas extraction (Candela et al, 2018;Chen et al, 1996;Lee et al, 2019).…”

Section: Mechanisms Of Human-induced Earthquakesmentioning

confidence: 99%

“…The earthquake induced by the Three Gorges Dam is a typical continued earthquake. Since the impoundment of the dam, earthquakes have been concentrated in seven areas, such as Badang Flame Stone, Badong Leijiaping, Badong Nanmuyuan-Wushan Peishi and they show a certain regularity (Chen et al, 2008). We have collected different types of induced earthquakes related to reservoirs in China and sorted them out in Table 5.…”

Section: Seismic Mechanisms Induced By Surface Mass Loadingmentioning

confidence: 99%

“…(b) Relationship diagram between earthquake and reservoir water level variation of the Daqiao structural reservoir (modified fromXie et al, 2004). (c) Relationship between structural and non-structural reservoir earthquakes and reservoir water level in the Three Gorges (modified fromChen et al, 2008).…”

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confidence: 99%

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Characteristics and mechanisms of human‐induced earthquakes in China from the QuakeQuake database

Chen

Zhu

et al. 2023

Geological Journal

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Based on the collation and collection of a large number of data, we construct an induced earthquake database, QuakeQuake, and report a total of 193 human-induced earthquake cases in China. 155 human-induced earthquakes in China recorded in the globalinduced earthquake database (HiQuake) are revisited and re-arranged by compiling the Chinese literature. The human-induced earthquakes in QuakeQuake database are classified into three levels of reliability, strong, moderate and weak levels, based on both human-induced processes and seismic activity. Three main categories including reservoir-induced earthquakes, mine-induced earthquakes and other induced earthquakes in China are sorted based on data recording and types of the induced earthquakes. Most of the induced earthquakes with strong level in QuakeQuake database are mainly minor earthquakes (3 ≤ M < 4.5). The focal depth of reservoir-induced and mining-induced earthquakes is within 30 and 8 km deep, respectively. The active type of source faults of the large induced earthquakes is mainly thrust type with the highest proportion. The largest observed magnitude of the induced earthquakes (M MAX ) correlates positively with the injection/extraction volume, reservoir dam heights, reservoir capacity and lithology of the reservoir area. Nine volume intervals corresponding to each induced earthquake type are figured out. Based on the analysis of the mechanisms of human-induced earthquakes in China, the main mechanisms of surface mass loading are karst collapse or gas explosion, pore water pressure effect and gravity energy release. Underground material extraction is mainly induced by the compaction of different reservoirs. Two injection types of underground material are gas injection and water injection. Gas injection is related to continuous stress loading and unloading. Two induction mechanisms of water injection are the increase of fault pore pressure and the change of fault load condition.

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