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2004•Journal of Seismological ResearchRequires access

The Application of Numerical Simulation in Evaluation of Tectonic Stability of Dam-site in Heishan Gorge

Aiguo Wang

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Abstract

By 3-D finite element simulation of the zone tectonic stress in Heishan Gorge, two future seismic dangerous areas were determined using rock rupture risk coefficient (KR) and fault gliding risk coefficient (KF) as criteria, which were located in the arc apex from Honggulian to Shijuan in Zhongwei-Tongxin active faults and the part east to Xihua mountain in Haiyuan active fault with epicenter depth of about 15Km and magnitude of M S7.3 and M S8.2 individually. The influence of the potential earthquake to the two dam-sites in Heishan Gorge shows that the Daliushu dam-site's influenced intensity can get to IX and the dam-site is in the meizoseismal area, which is unstable in tectonics, and the Xiaoguanyin dam-site's influenced intensity is about 7, which is comparatively stable in tectonics.

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What this paper is about

By 3-D finite element simulation of the zone tectonic stress in Heishan Gorge, two future seismic dangerous areas were determined using rock rupture risk coefficient (KR) and fault gliding risk coefficient (KF) as criteria, which were located in the arc apex from Honggulian to Shijuan in Zhongwei-Tongxin active faults and the part east to Xihua mountain in Haiyuan active fault with epicenter depth of about 15Km and magnitude of M S7.3 and M S8.2 individually. The influence of the potential earthquake to the two dam-sites in Heishan Gorge shows that the Daliushu dam-site's influenced intensity can get to IX and the dam-site is in the meizoseismal area, which is unstable in tectonics, and the Xiaoguanyin dam-site's influenced intensity is about 7, which is comparatively stable in tectonics.

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Available abstract

By 3-D finite element simulation of the zone tectonic stress in Heishan Gorge, two future seismic dangerous areas were determined using rock rupture risk coefficient (KR) and fault gliding risk coefficient (KF) as criteria, which were located in the arc apex from Honggulian to Shijuan in Zhongwei-Tongxin active faults and the part east to Xihua mountain in Haiyuan active fault with epicenter depth of about 15Km and magnitude of M S7.3 and M S8.2 individually. The influence of the potential earthquake to the two dam-sites in Heishan Gorge shows that the Daliushu dam-site's influenced intensity can get to IX and the dam-site is in the meizoseismal area, which is unstable in tectonics, and the Xiaoguanyin dam-site's influenced intensity is about 7, which is comparatively stable in tectonics.

Key concepts: Geology, Epicenter, Tectonics, Fault (geology), Magnitude (astronomy), Seismology, Active fault, Geomorphology

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