Feasibility Study Of The Tailings Reservoir In Yang Jia Ba Of Shaanxi Province

Aim:In our country the number of tailings Banks is numerous,the construction standard is low,the security management has a loophole,there are large security hidden dangers.Based on the analysis of the safety of the tailings reservoir of yangjiaba mine,it is safe and reliable to ensure the construction of the tailings reservoir.Methods:According to the design standard of the Zhifanggou tailings,the most adverse condition is the occurrence of flooding in 1000 years.The safety analysis of the tailings reservoir of the paper mill mainly from the stability of the dam and the discharge of the drainage system.The stability of the darm is based on the physical mechanical test of tailing materials and the theoretical analysis is carried out according to the relevant specifications.The drainage system determines its safety through hydraulic analysis of relevant drainage facilities.Conclusions:1 Zhifanggou both sides of the mountain is abundant,the peak elevation is far greater than the final tailings crest elevations,from the topography to support the construction of tailings ponds.From the point of view of seismic intensity,there is no late or recent active faults in the area where the tailings of Zhifanggou tailings are located.2 The geotechnical test of the tailings and the tailings of the sediment area sampled from the sediment beach was carried out.The physical and mechanical charateristics of the tailings were analyzed.Under the most unfavorable operating conditions,the total stability and effective stress method are used to calculate the safety and stability coefficient of anti-sliding stability of dam slope in Zhifanggouy which is greater than the minimum required by the code to meet the safety requirements.3 The construction of tailings pond drainage system using "drainage wells into the flow,the main branch tunnel vent" approach.Drainage wells in the reservoir area,retaining dam and drainage ditch design across the Strait meet the design standards for tailings ponds and meet the flood discharge requirements.At the same time,the tailings dam may leak and breach the potential safety problem such as the construction of drainage works and accidents.4 Due to its own characteristics,tailings ponds are potentially dangerous.After defining the possible types of geological disaters and erosion characterstics of dam bodies,the tailings prevention measures have been well established,including non-engineering measures such as the establishment of scientific management rules and regulations as well as engineering measures to dam a dam sand flow block.