盘州市锅圈洞水库岩溶发育规律及水库渗漏原因分析

Karst development law and the causes of reservoir leakage in Guoquandong Reservoir in Panzhou City

锅圈洞水库为一岩溶地区拟在建水库,库区出露地层为三叠系永宁镇组(T1yn)灰色中厚层状灰岩、白云岩,为强可溶岩,透水层,岩溶十分发育。地下水主要发育以岩溶泉为集中排泄点的锅门洞暗河岩溶水系统,包括锅门洞小河集雨区、娅密集雨区、两河集雨区;以盲谷入伏点归并的岩溶水流动系统包括海子铺盲谷岩溶水系统、马场屯、小猴场盲谷岩溶水系统、吴官屯盲谷岩溶水系统。水库左岸存在通过层面及溶蚀裂隙向拖长江右岸鸡锁箐~马脚寺汇合口河段渗漏的可能。水库右岸存在向拖长江右岸岩子脚村河段至上游马脚寺汇合口段渗漏的可能,也存在向S14岩溶管道的渗漏问题。

The Guoquandong Reservoir is a a reservoir to be built in karst area,the outcrop strata of the reservoir area are gray medium thickness bedded limestone and dolomite of the Triassic Yongningzhen Formation(T1yn).For strong soluble rock,permeable layer,karst is very developed.The underground water mainly develops the karst water system of the Guomendong underground river with the karst spring as the concentrated discharge point.Including Guomendong Xiaohe rainwater collection area,Yamei rainwater collection area,and Lianghe rainwater collection area.The karst water flow system combined with the entry point of the blind valley includes the karst water system of the blind valley of Haizipu,the karst water system of the blind valley of Machangtun,the blind valley of Xiaohouchang,and the karst water system of the blind valley of Wuguantun.On the left bank of the reservoir,there is a possibility of leakage through the layers and dissolution fissures to the right bank of the Yangtze River from Jisuoqing to Majiaosi confluence.On the right bank of the reservoir,there is a possibility of leakage from Yanzijiao Village on the right bank of the Yangtze River to the confluence of upstream Majiao Temple,and there is also a leakage problem to the S14 karst pipeline.