Causative Relationship between Basement Stretching and Ground Fissures Formation in Weihe Basin
详细信息
- 责任者：Deng Yahong (Key Laboratory of Western China’s Mineral Resources and Geological Engineering ; Ministry of Education ; Chang’an University ; Xi’an 710054 ; China) ; Peng Jianbing
- 刊名：Journal of Engineering Geology
- 出版年：2013
- 卷期：21(1)
- 关键词：地裂缝 ; ground fissures ; 渭河盆地 ; Weihe Basin
- 页码：p.92-96
- 图表：illus., 1 table, 11 refs.
- 分类号：1800
- issnNo：ISSN1004-9665
- isbnNo：CN11-3249/P
摘要
The Weihe Basin can be the most developed area of ground fissures and the associated geo-hazard in China and even in the world.Taking the Weihe Basin as the prototype,a numerical analysis with finite element method is made to study the stress and strain response characteristics of superficial ground and multistage fracture system subjected to the action of basement stretching.The germination relationship between deep structure activities and ground fissures development is revealed.Results show that the basement stretching can cause the tensile deformation of superficial ground.When this kind of action is coupled with normal dip-slipping tension of faults,it can inevitably form or aggravate the tension-shear fracturing,and establish the tectonic foundation for the development of ground fissures.
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