秦巴地区地壳稳定性评价

三峡水库引水工程是南水北调的重要补充工程,具有重要的战略意义和经济意义。本文在分析现今构造应力场、地壳结构、构造格架、活动断裂、地震活动、工程岩组等影响地壳稳定性主要因素的基础上,利用模糊数学综合评价模型评价秦巴地区的地壳稳定性。评价结果表明,秦巴地区地壳稳定性程度较高,适合兴建大型引水工程。

ASSESSMENT oF CRUSTAL STABILITY IN THE QINLING-DABA REGION

The Three Gorges reservoir water-diversion project is a new line of the southnorth water-diversion project.There are six major factors affecting the crustal stability in the region:crustal structure,present tectonic stress fields,tectonic framework,fault activity,earthquake activity and rock properties.The authors select dominant conditions affecting regional crust stability as evaluating factors to construct a fuzzy evaluation model.Based on the above-mentioned six factors and by using the fuzzy evaluation model,the authors evaluate the crustal stability of the Qinling-Daba region.The results show that the Qinling-Daba region has a higher degree of crustal stability and is and suitable for the large water diversion project.