摘要
研究区位于红河与南盘江的分水岭地段,为岩溶发育区域,构造上位于滇东南台向斜褶皱断裂带的西南部位,出露地层岩性主要为三叠纪地层,并有大片酸性火成岩出露。厚层—中厚层质纯的石灰岩、白云岩占尾矿库塌陷总数的69%,岩溶密度为33个/km2;大理岩、大理化灰岩占尾矿库总塌陷的16.3%,岩溶密度为8.7个/km2;薄层泥质灰岩,岩溶密度为0.65个/km2,只占尾矿库总塌陷的4.7%。该区域岩溶发育规律受构造控制,岩溶发育多集中在断层构造带上、断层交会部位和背斜轴部,同时岩溶沿可溶岩与非可溶岩的接触线发育。在防治措施方面,做好库区渗漏监测,避免渗漏发生,雨季加强监测预警,避免外溢发生。同时做好库区底部防渗,尾矿堆放时按设计坡比堆放,设置排水沟,监测堆石坝外坡面水平与垂直位移,以发现坝体是否变形,用以判断坝体的安全运行状况。
The study area is located in the watershed of Honghe River and Nanpanjiang River,which is a karst area.It is structurally located in the southwest part of the synclinal fold fault zone of southeast Yunnan platform.The exposed strata are mainly Triassic strata,and there are a large amount of acid igneous rocks.Based on the analysis of lithology,the thick and medium-thick pure limestone and dolomite account for 69%of the total subsidence of tailings pond,and the karst density is 33 per square kilometer.Marble and macrophysical limestone account for 16.3%of the total collapse of tailings pond,and the karst density is 8.7 per square kilometer.The karst density of thin layer argillaceous limestone is 0.65 per square kilometer,which only accounts for 4.7%of the total collapse of tailings pond.Karst development is controlled by structure.Karst development is mainly concentrated in fault structural zone,fault intersection area and anticlinal axis,and karst develops along the contact line between soluble and non-soluble rocks.In the process of engineering construction and operation of prevention and control measures,do a good job in the reservoir leakage monitoring to avoid leakage,strengthen the rainy season monitoring and early warning to avoid spillage.At the same time,do a good job of seepage prevention at the bottom of the reservoir area,pile up tailings according to the design slope ratio,set up drainage ditches,monitor horizontal and vertical displacement of the rockfill dam slope surface to find whether the dam deformation to judge the safe operation of the dam.
作者
许汉华
何训
眭素刚
聂闻
王光进
XU Hanhua;HE Xun;SUI Sugang;WANG Guangjin(Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co.,Ltd.;Yunnan Key Lab-oratory of Geotechnical Engineering and Geohazards;State Key Laboratory of Safety and Health for Metal Mines;School of Land and Resources Engineering,Kunming University of Science and Technology)
出处
《现代矿业》
CAS
2021年第6期175-178,182,共5页
Modern Mining
关键词
尾矿库
岩溶区勘察
岩性—构造
岩溶发育规律
防治措施
tailings pond
investigation of karst areas
lithology-structure
law of karst development
prevention and control measures
