摘要
本文从沉积建造、岩浆活动、变质作用、主体构造、新构过运动、深部地球物理场和地壳结构等方面阐述了小湾电站工程区的区域构造背景，并对与工程区域构造稳定住评价有直接关系的澜沧江断裂和南汀河断裂进行了分段研究．提出了现今构造应力场的研究方法和判定了现今构造应力场特征．从复杂的地震地质环境中分析了地震活动时空分布特点和震中迁移规律，以及对区内进行了地震危险区区划；并对工程区的地震基本烈度提出看法．结合水库诱发地震对工程的影响，对小湾水电站的区域构造稳定作出较全面的综合评价．
The background of regional tectonite within the area of Xiaowan Hydropower Station is stated here from the aspects of sedimentation formation, magmatic activities,metamorphism, principal structure, new tectonite movement,deep geophysical field and earth crust structure. Segmental research is carried out in the light of the fractures at Lancang River and Nanding River which affect the stability of regional tectonite in the engineering area. Research method is suggested for present structural stress and its charactetristics to be determined. The feature of earthquake activity distributed in time and space and the moving regularity of epicentre are analyzed according to complex geologic enviroment of earthquake. The dangerous seismic area is divided and the basic earthquake intensity in the engineering area is proposed. Connect with the effect of earthquake induced by the reservoir, a comprehensive evaluation about the stability of the regional tectonite within Xiaowan Hydropower Station is made.
出处
《云南水力发电》
1996年第1期19-27,共9页
Yunnan Water Power
关键词
水电站
区域构造
稳定性
活断层
地震
Xiaowan Hydropower Station,stability of regional tectonite, active fault,earthquake,research method
