An Analysis of the Geodynamical Evolution and Geological Structural Environment in the Yangtze Gorges Project
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摘要: 根据卫星遥感影像特征和区域地质调查与地球应力分析的综合材料,运用遥感地质学和地球动力学及地质环境演变的分析方法,对长江三峡工程的背景构造(区域构造)-岩块构造(体域构造)-坝区构造(局域构造)进行了多层次的系统研究,查清了地质构造环境演变过程及其变化规律,发现了多级构造序次及多级构造应力场之间的相互转变关系,提出区域应力场与库区荷载应力场和周边采矿卸载应力场的共振效应,是对工程安全运行和长周期工程寿命的最大潜在威胁,为大型工程优化管理和工程灾害风险预防及国家建设合理决策等方面提供科学依据。
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关键词:
- 三峡工程地质构造环境 /
- 构造域(区域-块体-坝区)控制及转化 /
- 构造应力场共振效应 /
- 工程管理和灾害预防及决策
Abstract: Based on comprehensive data composed of remote sensing images, regional geological survey and earth stress analysis and using the analytical method of remote sensing geology, earth dynamics and geological environment evolution, the authors carried out multilayered systematic research on background structures (regional structures) - rock mass structures (partial structures) - dam area structures (local structures) of the Yangtze Gorges project, ascertained the evolution process of geological structural environment and its variation regularity, discovered the mutual transition relationship between multi-level structural sequence and multi-level structural stress field, and pointed out that the resonance effect caused by regional stress field, reservoir load stress field and peripheral mining uninstall stress field seems to be the greatest latent throat to engineering safe running and long-periodic engineering life-span. The results obtained by the authors provide a scientific basis for such aspects as large-scale engineering optimized management, engineering disaster risk prevention and rational policy-making for national construction. -
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