The Optimal Allocation Of Water Resources In Mountain Iron Ore Mining Area In Si Shanling Of Benxi

Proposed SiShan Ridge Iron District is located in Benxi City in Liaoning Province region think Nanfen mountain village area,which belongs to concealed blind iron ore mining,ore body buried deep mining of deep mining,large-diameter hole stope subsequent filling method.Mine planning and production of the total water consumption of 377,600 m3/d,while the lack of controllability within the Area of water regulation works,can not provide adequate long-term stable supply of water,so how to protect the reasonable requirements of the building project to take water,promote the optimization of water resources configuration and sustainable use,to reduce the impact on the region's water resources and environment,has become the key problems that restrict the construction and development of iron ore,it has been provincial and municipal departments attach great importance.For this reason,this time to think Benxi Iron Mountain Mine optimal allocation of water resources research,with the reliability of water for the project,feasibility analysis,to ensure the rational development and utilization of water resources and provide scientific basis.The main results are as follows:1.Water Supply in the study areaAnalysis of exploitation and utilization of water resources in the study area,calculate water demand and other mine production and life use rated method to analyze the total water demand and domestic mining,mineral,water circulation trends over time.Analysis of water resources supply and demand balance.Mine planning and production results total water consumption is 377,600 m3/d,add new water to 17,900 m3/d,which produce fresh water 17,200 m3/d,living water of 700 m3/d.Mining water demand proportion of the total water demand of domestic water was 0.18%,mineral water demand within the mining area where the mine is the main water unit.2.Water Quality Evaluation Study AreaThe use of monitoring data Taizi River,small river and three river water quality section,select COD,BODS,NH3-N,permanganate index,petroleum,volatile phenol and other indicators,using gray clustering method evaluation,the results of the Taizi River Laoguan Lizi,small river Mendoza sub-section ? class water quality,Xing'an section for the class ?;GongMiao sub bridge section of water three river for class ?;small river village bridge yet,North stage section,Qiu section are ? class,to the respective functional area water standard.Guanyinge water intake dam reservoir water quality section conform Class ? standard.According to water quality monitoring data mining B5,zk105,zk001 groundwater sampling points chosen color(degrees),smell and taste,turbidity,pH,total hardness,total dissolved solids,sulfate,chloride,iron,nitrate,Asia nitrate,fluoride and other indicators,based on"groundwater Quality standard" comprehensive quality evaluation Method,results area groundwater quality is poor to excellent,respectively.3.Feasibility Analysis of regional water resources utilizationArea available water resources underground mine drainage,tailings water circulation.Mine displacement calculated using the "big well method",the level of the roadway inflow method,single-hole test data empirical formula method,balance method to calculate the inflow of underground mine drainage,groundwater discharge given ore calculation results for 3000.5?6624.9 m3/d.By displacement of mineral water is discharged into the environmental impact of small river of analysis,mine drainage can not efflux,must be used.Residential tailings downstream circulating water through tailings major impact on circulating water intake siting costs,considering the area,the distance from the mining area,the catchment area,the trench residents downstream residents,from the recent Feasibility Analysis distance,total storage capacity,service hours,design dam height,the maximum height of the use of the maximum available storage capacity,transportation mode,transmission distance,maximum geometric elevation,backwater way,backwater distance factor,the establishment of mine tailings site Evaluation Index System.With this system,using TOPSIS method 6 may alternatively Tailings decision ordering scheme,the final choice Dadonggou as tailings sites.For mine tailings site evaluation system established by this empirical method to overcome the past in terms of location or tailings site selection based on the lack of a single factor,it has some innovations.4.Mine Water Resources Optimal AllocationSiShan Ridge Iron District by constructing water resources optimal allocation model,using dynamic programming method for solving optimization problems.The results reflect decreased with mine drainage water,municipal water supply need to gradually increase,and as proposed by the water capacity and water scale Guangyinge Reservoir Diversion Project water supply should be in accordance 14800 m3/d of water to the planning and design.5.Water Supply Reliability Analysis of Mining configurationThe study of mining ore respectively drainage and water conveyance project Guanyinge reliability analysis.Mining mine drainage water were analyzed by reliability impact Guanyinge reliability analysis of water conveyance project in meeting its primary analysis Benxi City,Benxi County Benxi city and town economic and social development under the premise of whether the spare capacity to meet the water thought Mountain iron ore demand water requirements,analysis results mine water source configuration is reliable.