TECTONIC STABILITY ANALYSIS OF THE KAX RIVER HYDROELECTRIC PROJECT AREA
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摘要: 本文对某大型水电枢纽工程场址的构造稳定性条件进行了研究, 详细分析了区域地质构造背景、断层活动性、构造应力场特征以及地震活动性等问题.分析可知候选水电站坝址处于地壳构造活跃区内的一个相对稳定的地块, 断层活动性较弱, 区域构造地质作用相对较弱, 完全可以通过工程措施予以控制, 适宜于开展水利枢纽工程的建设.Abstract: This paper has studied the tectonic stability of a dam site for a large-scale hydroelectric project, and analyzed the regional geological tectonic setting, activity of faults, historical earthquakes, tectonic stress fields of the project area.The analysis indicates that the dam site of the hydroelectric candidate project lies in a relatively stable block of the tectonically active region, where the fault movement is rather weak and so is the regional tectonic movement.Therefore, this site can be controlled by engineering measures and is suitable to the construction of the hydroelectric project.
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Key words:
- Kax River fault /
- hydroelectric project /
- tectonic stability /
- activity of fault
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图 1 候选坝址地区区域地质简图(据文献[1], 略有修改)
1.全新统; 2.上更新统; 3.上新统:砂岩与砾岩互层; 4.侏罗系中下统:粉砂岩、泥岩、砾岩夹煤线; 5.二叠系上统小山萨依组:砾岩、砂岩、粉砂岩、泥岩; 6.石炭系中统:粗砂岩、砂砾岩、砂质页岩、凝灰岩夹石膏; 7.石炭系下统:中酸性火山碎屑岩、灰岩、砂岩、凝灰质熔岩、安山玢岩等; 8.志留系上统:凝灰质钙质粉砂岩、石英砂岩、泥岩; 9.志留系中统:片理化泥质粉砂岩、硅钙质粉砂泥岩夹砂岩; 10.花岗闪长岩; 11.石英斑岩; 12.石英斑岩; 13.地质界线; 14.不整合界线; 15.实测、推测断层; 16.实测、推测逆掩断层; 17.实测、推测平移断层; 18.候选坝址点
Figure 1. Geological sketch map of the candidate dam site (modified from reference [1])
表 1 北天山西部地区6.0≤M≤8.0级地震一览表
Table 1. Summary of earthquakes with 6.0≤M ≤8.0 in the west of the Northern Tianshan Mountains
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[1] 钟嘉猷, 史兰斌, 唐汉军, 李祖信, 等.新疆喀什河吉林台水电站地区稳定性研究[J].工程地质学报, 1994, 12, 2(2):13~ 22. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK199400083918 [2] Deng Qi-dong, et al.Paleoseismology of the Northern Piedmont of Tianshan Mountains, Northwestern China.JGR, 1996, 101(29). doi: 10.1029/95JB02739/full [3] 冯先岳.新疆古地震[M].新疆科技卫生出版社, 乌鲁木齐, 1997.9. [4] Feng Xian-yue. Active Rault in North Tianshan Region. Journal of Earthquake Prediction of Research, 1996, 5(3). [5] 冯先岳, 栾超群, 李军, 等.新疆吉林台水电站区域稳定性分析[J], 内陆地震, 1988, 3:244~ 252. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK000004331633 [6] 尹光华, 蒋靖祥, 张勇.新疆伊犁喀什河断裂带及其活动性研究[J], 内陆地震, 2003, 6, 17(2):109~ 116. doi: 10.3969/j.issn.1001-8956.2003.02.003 [7] 孙洪艳, 李志祥, 田明中, 等.第四纪测年研究新进展[J], 地质力学学报, 2003, 12, 9(4):371~ 378. doi: 10.3969/j.issn.1006-6616.2003.04.009 [8] 国家质量技术监督局, 中华人民共和国建设部. 水利水电工程地质勘测规范(GB50287—99)[S]. 1999. [9] 柔洁.吉林台电站场地地震活动性分析[J], 内陆地震, 1989, 1:34~ 41. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK000002099678 [10] 姜慧, 杨章, 唐丽华, 等.吉林台水电站坝址人造地震动研究[J].内陆地震, 2000, 9, 14(3):229~ 233. http://d.old.wanfangdata.com.cn/Periodical/nldz200003006 [11] 新疆维吾尔自治区地震局编.新疆维吾尔自治区地震资料汇编[M].地震出版社, 北京, 1985.9. [12] 刘德富.新疆西部地区地震活动的自然节律[J].地震, 1986, 6:48~ 50. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK000005171348 -
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