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Method for predicting reservoir-induced earthquake based on surface gravity and GNSS observation data

A technology of observation data and reservoirs, applied in the field of prediction of reservoir-induced earthquakes based on surface gravity and GNSS observation data, can solve problems such as loss of life and property safety, and achieve disaster mitigation and high reference value

Inactive Publication Date: 2018-11-30
INST OF EARTHQUAKE SCI CHINA EARTHQUAKE ADMINISTATION
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Problems solved by technology

The occurrence of earthquakes induced by these reservoirs has brought immeasurable losses to the safety of people's lives and properties

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  • Method for predicting reservoir-induced earthquake based on surface gravity and GNSS observation data
  • Method for predicting reservoir-induced earthquake based on surface gravity and GNSS observation data
  • Method for predicting reservoir-induced earthquake based on surface gravity and GNSS observation data

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[0024] The structure and features of the present invention will be described in detail below in conjunction with the drawings and embodiments. It should be noted that various modifications can be made to the embodiments disclosed herein, therefore, the embodiments disclosed in the specification should not be regarded as limitations on the present invention, but only as examples of embodiments, and its purpose is to make the present invention The features of the invention are self-evident.

[0025] Reservoir-induced earthquakes are mainly due to the impact of water on the surrounding lithosphere during the storage or discharge of the reservoir, which causes seismic activity in and around the reservoir area. Reservoir earthquakes are generally divided into four situations: ① There is no historical earthquake record before the water storage, and there is obvious seismic activity after the water storage; ② The magnitude and frequency of the earthquake after the water storage are h...

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Abstract

The invention disclose a method for predicting a reservoir-induced earthquake based on surface gravity and GNSS observation data, namely performing computational simulation on a vertical constructionstress borne by a reservoir section / reach lithosphere; if the vertical construction stress borne by the lithosphere is far away from the geocenter (in an upward direction), the section / reach is applicable to building a large reservoir without triggering the strong reservoir-induced earthquake; if the vertical construction stress borne by the lithosphere points to the geocenter (in a downward direction), the section / reach is not applicable to building the large reservoir and has the possibility of triggering the strong reservoir-induced earthquake. According to the method provided by the invention, through analyzing the relation between a vertical construction stress field borne by the lithosphere and a surface load along with the construction of the large reservoir, the new method for predicting the reservoir-induced earthquake is given from the angle of lithosphere balance. The method provided by the invention can early predict the earthquake danger that may be triggered by reservoirfilling according to the surface gravity and the GNSS observation data, is beneficial to reducing disasters caused by the reservoir-induced earthquake, and also can provide a theoretical basis for site selection of large-scale water conservancy construction.

Description

technical field [0001] The invention relates to a method for predicting reservoir-induced earthquakes, in particular, the invention relates to a method for predicting reservoir-induced earthquakes based on surface gravity and GNSS observation data. Background technique [0002] With the construction of about 11 reservoirs around the world every year, the earthquake disasters induced by reservoirs and their dangers have attracted more and more attention. Reservoir-induced earthquakes are a special type of seismic activity, mainly due to the seismic activity in and around the reservoir area caused by the reservoir water storage / release process. [0003] According to incomplete statistics, there have been 134 reservoir-induced earthquakes in the world, including 4 cases of earthquakes above magnitude 6. The largest reservoir-induced earthquake in the world is the Goyna Reservoir earthquake of magnitude 6.5 in India. The largest reservoir-induced earthquake in my country was Mar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/00
CPCG01V1/01
Inventor 高尚华付广裕佘雅文
Owner INST OF EARTHQUAKE SCI CHINA EARTHQUAKE ADMINISTATION
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