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Applications of online monitoring technology for tailings dam on digital mine

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中国有色金属学会会刊：英文版 2011年第S3期21卷 604-609页

作者： YU Guang-ming1, SONG Chuan-wang1, ZOU Jing-bo1, WU Yan-xia1, PAN Yong-zhan1, LI Liang1, LI Ran1, WANG Pei-shou2, WANG Yan-lei2 1. School of Civil Engineering, Qingdao Technological University, Qingdao 266033, China 2. Hedong Goldmine, Zhaojin Mining Industry Company, Zhaoyuan 265400, China [a] School of Civil Engineering Qingdao Technological University Qingdao 266033 China [b] Hedong Goldmine Zhaojin Mining Industry Company Zhaoyuan 265400 China

Considering its structural features, geometric shapes, service mode, environmental media, mechanical behavior, etc, the special nature and complexity of tailings dam were summarized. The technical approach to safety management for tailings dam was proposed, which is the on-line automated monitoring and early warning information. The results show that a strong theoretical basis can be provided for security monitoring and security management of tailings dam. Online automated monitoring system for tailings dam has full implementation of the information. It is applied widely in Lingnan gold mine, Xiadian gold mine and Hedong gold mine in Zhaoyuan, Shandong Province, and achieves good effect.

关键词： digital mine tailings dam online monitoring security monitoring digitization

Periodically hydrologic alterations decouple the relationships between physicochemical variables and chlorophyll-a in a dam-induced urban lake

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Journal of Environmental Sciences 2021年第1期33卷 187-195页

作者： Tianyang Li Yuqi Zhang Binghui He Bing Yang Qi Huang College of Resources and Enuironment Southwest UniversityChongqing 400715China Chongqing Eco-Environmental Monitoring Center Chongqing 401147China Guiyang Engineering Corporation Limited Power ChinaGuiyang 550081China

Periodically hydrologic alterations driven by seasonal change and water storage capacity management strongly modify physicochemical properties and chlorophyll-a(Chl-a)and their interactions in dam-induced ***,the extent and magnitude of these changes still remain *** study aimed to determine the effects of periodically hydrologic alterations on physicochemical variables and Chl-a in the dam-induced urban Hanfeng Lake,upstream of Three Gorges *** in Chl-a and 13 physicochemical variables were recorded monthly in the lake from January 2013 to December ***-a was neither seasonal nor inter-annual differences while a few physical variables such as flow velocity(V)exhibited significantly seasonal variabilities,and chemical variables like total nitrogen(TN),nitrate-nitrogen(NO3-N),total phosphorus(TP),dissolved silica(DSi)were markedly inter-annual *** TN:TP(40:1)and lower NO3-N:DSi(0.8:1)relative to balanced stoichiometric ratios suggested changes in composition of phytoplankton communities and potentially increased proportion of diatom in Hanfeng ***-a was predicable by combination of dissolved oxygen(DO),TN and DSi in dry season,and by V alone in wet *** the whole study period,Chl-a was solely negatively correlated with TN:TP,indicating decline in N concentration and increase in P could therefore increase *** results highlight pronounced decoupling of linkages between Chl-a and physicochemical variables affected by periodically hydrologic alterations in dam-induced aquatic systems.

关键词： Chlorophyll-a Nutrients Dissolved silica dam Hydrologic alterations

Numerical simulation of dam break flow impact on vertical cylinder by cumulant lattice Boltzmann method

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Journal of Hydrodynamics 2021年第2期33卷 185-194页

作者： Seiya Watanabe Shintaro Fujisaki Changhong Hu Research Institute for Applied Mechanics Kyushu UniversityFukuokaJapan School of Engineering Sciences Kyushu UniversityFukuokaJapan

The purpose of this study is to apply the cumulant lattice Boltzmann method(LBM)to simulate high Reynolds number free surface *** single-phase cumulant LBM is extended to solve the free surface flows by using the phase-field method as the interface capturing *** simulations are performed on an experimental problem of dam break flow impact on a vertical *** numerical aspects such as collision model,grid resolution,time step and interface mobility parameter are *** is found that the severe impact pressure oscillation in the simulation by the conventional SRT model,can be significantly suppressed by the cumulant *** agreement between the cumulant LBM numerical simulation and the experiment has been obtained on both the free surface profiles and the impact *** numerical results obtained by the present study demonstrate that the cumulant LBM can be a powerful numerical tool for simulations of violent free surface flow problems.

关键词： Lattice Boltzmann method(LBM) free surface flow wave impact pressure dam break flow cumulant model

Cascading dam breach process simulation using a coupled modeling platform

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Science China(Technological Sciences) 2019年第8期62卷 1455-1466页

作者： LIU ZhiPing GUO XinLei ZHOU XingBo FU Hui XIA QingFu LI ShaoJun State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower Research Beijing 100038 China China Renewable Energy Engineering Institute Beijing 100120 China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil Mechanics Chinese Academy of Sciences Wuhan 430071 China

This study evaluates the possibility of a cascade failure by developing a coupled breach-modeling platform based on onedimensional flow modeling of the river channel, flood propagation, regulation process of reservoir fluctuation, overtopping with breaching, and wave damping downstream. A hyperbolic model of the DB-IWHR was embedded into the platform to simulate the dam breaching process. Five breach models and software were used to calculate the Tangjiashan barrier lake breaching. The results of a sensitivity study were then compared with the measured data. The peak flow and the time of occurrence were confirmed to be predictable with a reasonable accuracy if the input values were within ranges appropriate for the model. The approach was applied to a case involving two layout planning schemes for a cascade of rock-filled dams under extreme operating conditions. The probability of the failure of a key control cascade downstream caused by a continuous cascade breach upstream was simulated. Moreover, measures to prevent the transmission of risk by advance warnings were investigated. The proposed methodology and the discharge capacity measures provide guidelines to assess the risk to a cascade of dams under extreme operating conditions and offer support for the design criteria of unusual discharge structures for very large dams.

关键词： cascades dam breach extreme operating condition sensitivity analysis flood discharge structure

An approach to quick and easy evaluation of the dam breach flood

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Science China(Technological Sciences) 2019年第10期62卷 1773-1782页

作者： CHEN ZuYu PING ZiYi WANG NaiXin YU Shu CHEN ShuJing Institute of Geotechnical Engineering Zhejiang UniversityHangzhou310027China Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education Zhejiang UniversityHangzhou310058China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing100038China Department of Engineering Training National Academy for Mayors of ChinaBeijing100029China

In the context of an impending dam failure, quick evaluation of dam breach flood is necessary. Previous studies provided an approach to calculate the dam breach hydrograph using an Excel spreadsheet based on the improved soil erosion model and numerical algorithm. However, calculation of the breach lateral enlargement requires the modeling of the successive collapse of the breach banks. It is time-consuming with special training, which is difficult to provide during an emergency. This study proposes that the lateral enlargement process can be modeled using a hyperbolic relationship with sufficient accuracy. Consequently, field engineers can perform the dam breach analysis along with the sensitive study for a target case within 1 h in an Excel spreadsheet which is self-tutorial. This paper presents this easy and quick approach based on only fifteen input parameters that can be determined based on the experience. This approach can also be used for the preliminary study when a dam safety planning work is undertaken.

关键词： dam breach flood breach lateral enlargement hyperbolic relationship

Assessment model of dam operation risk based on monitoring data

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Science China(Technological Sciences) 2007年第z1期50卷 144-152页

作者： WU ZhongRu1,2?, SU HuaiZhi1,2 & GUO HaiQing1 1 College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China 2 National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Nanjing 210098, China 1. College of Water Conservancy and Hydropower Engineering Hohai University Nanjing 210098 China 2. National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety Nanjing 210098 China

Although the dams produce remarkable social and economic benefits, the threat made by unsafe dams to the life and property of people who live in the lower river area is un-negligible. Based on the monitoring data which reflect the safety condition of dams, the risk degree concept is proposed and the analysis system and model for evaluating risk degree (rate) are established in this paper by combining the reliability theory and field monitoring data. The analysis method for risk degree is presented based on Bayesian approach. A five-grade risk degree system for dam operation risk and corresponding risk degree is put forward according to the safety condition of dams. The operation risks of four cascade dams on some river are analyzed by the model and approach presented here and the result is adopted by the owner.

关键词： dam monitoring data operation risk degree analysis model

Study on multi-scheme analysis and evaluation method for concrete sequence placement of high arch dam

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Science China(Technological Sciences) 2011年第S1期54卷 47-53页

作者： ZHONG GuiLiang,REN BingYu & TONG DaWei Department of Hydraulic and Hydroelectric Engineering,School of Civil Engineering,Tianjin University,Tianjin 300072,China 1. Department of Hydraulic and Hydroelectric Engineering School of Civil Engineering Tianjin University Tianjin 300072 China

A complete scheme for solving the key scientific problems of how to make concrete sequence placement scheme of high arch dam reasonable and feasible and how to meet the need of construction process was ***,based on a coupling analysis of concrete sequence placement system of high arch dam,a mathematical model considering complex construction constraints was ***,a multi-scheme computational analysis method for concrete sequence placement of high arch dam was proposed based on dynamic ***,a multi-scheme evaluation method for concrete sequence placement was put forward based on analytic hierarchy ***,feedback guidance for progress control and management in the high arch dam construction process was ***,these methods were applied to a practical project to show that the methods can analyze and evaluate multi-scheme for concrete sequence placement of high arch dam effectively,optimize the process of dam concrete sequence placement,and recommend engineering *** methods provide new theoretical principles and technical measures for real-time progress control in the high arch dam construction.

关键词： sequence placement analysis multi-scheme evaluation dynamic simulation analytic hierarchy process high arch dam construction

Flood management of Dongting Lake after operation of Three Gorges dam

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Water Science and Engineering 2017年第4期10卷 303-310页

作者： Xi-jun Lai Zi-ming Wang Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography&LimnologyChinese Academy of Sciences(CAS)Nanjing 210008China Zhejiang Institute of Hydraulics and Estuary Hangzhou 310020Chin

Full operation of the Three Gorges dam(TGD) reduces flood risk of the middle and lower parts of the Yangtze River Basin. However,Dongting Lake, which is located in the Yangtze River Basin, is still at high risk for potentially severe flooding in the future. The effects of the TGD on flood processes were investigated using a hydrodynamic model. The 1998 and 2010 flood events before and after the operation of the TGD, respectively, were analyzed. The numerical results show that the operation of the TGD changes flood processes, including the timing and magnitude of flood peaks in Dongting Lake. The TGD can effectively reduce the flood level in Dongting Lake, which is mainly caused by the flood water from the upper reach of the Yangtze River. This is not the case, however, for floods mainly induced by flood water from four main rivers in the catchment. In view of this, a comprehensive strategy for flood management in Dongting Lake is required. Non-engineering measures, such as warning systems and combined operation of the TGD and other reservoirs in the catchment, as well as traditional engineering measures, should be further improved. Meanwhile, a sustainable philosophy for flood control, including natural flood management and lake restoration, is recommended to reduce the flood risk.

关键词： Three Gorges dam Flood control Water level Hydrodynamic model Dongting Lake

dam risk assistant analysis system design

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Science China(Technological Sciences) 2008年第S2期51卷 101-109页

作者： HE XianFeng1,2,3,GU ChongShi3,4,WU ZhongRu3,4 & SU HuaiZhi3,4 1 Yellow River Institute of Hydraulic Research,Zhengzhou 450003,China 2 Embankment Security Defect Prevention and Control Engineering Research Center of MWR,Zhengzhou 45000,China 3 College of Water Resources and Hydropower Engineering,Hohai University,Nanjing 210098,China 4 National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety,Hohai University,Nanjing 210098,China Yellow River Institute of Hydraulic Research Zhengzhou 450003 China Embankment Security Defect Prevention and Control Engineering Research Center of MWR Zhengzhou 45000 China College of Water Resources and Hydropower Engineering Hohai University Nanjing 210098 China National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety Hohai University Nanjing 210098 China

In order to reduce the labor intensity and task difficulty of dam risk analysis and to meet the actual requirement of dam risk analysis,it is necessary to establish a dam risk assistant analysis *** program structure and the implementation ways of the dam risk assistant analysis system are analyzed,and a procedural framework with "three-tier and multi-database" structure and "level structure" is *** concept of dam risk assessment system modular development is proposed and the coupled mode of function module and data is ***,the dam risk assistant analysis system is developed using Delphi visual programming language.

关键词： dam risk risk analysis assistant analysis system