Study Of Environmental Risks For Project Of Gold Mining Beneficiation

At present, China’s gold industry has formed a complete gold industry fromgeological exploration, mining, smelting, and processing system. The gold industry inthe protection of national economic and social development，at the same time, it alsobrings a series of environmental problems. The growing concern over the problems ofwater resources，geological environment and soil environment pollution caused bymining beneficiation. In particular, the risk of the tailings reservoir: the tailings leak,the tailings dam failure, tailings transmission pipeline drip. Therefore, we shall carryout a risk assessment of mining beneficiation engineering, established of a riskmanagement system. Through enhanced environmental risk management, reduce therisk of environmental accidents, reduce the loss.The focus of the environmental risk assessment in the mining beneficiationproject is the tailings. This article provided a summary of the characteristics of tailingpond related accidents both in China and abroad， investigate the method ofenvironmental risk assessment of the tailings. Established environmental riskassessment based on the tailing pond risk management system. As the case ShandongGold Group Co., Ltd. Dongfeng Mine mining project, The companies recognize thatthe environmental risks of the operating unit, the production process, storage sites andother facilities through the identify of risk, risk analysis and Consequence calculation.Allow enterprises to understand that the biggest source of risk, and proposedemergency measures and social contingency plans to reduce accident probability,Which guide enterprises to strengthen the management of risk sources, reducing theprobability of the accident, slow down and eliminate the risk of accidents, propertyand the adverse effects of the ecological environment. The study made the followingconclusions:(1) Based on research status and statistics of the accident of the tailing pond inhistory, the main causes of the tailings dam include,activities earthquake, floodovertopping, slope instability, seepage damage, structural damage, and human management. According to the cause of the accident, we established risk assessmentof mining beneficiation tailings library standards and methods. Based onenvironmental risk assessment conclusions, we proposed risk prevention measures.(2) In the construction and operation there is risk of accidents in the tailings ofthe mining industry, mining and engineering. Environment and people’s lives wouldbe faced with the deadly risks by the accident of tailing pond. After the accident, theimpact depends on the surrounding environmental conditions of the tailings.Therefore, in the process of urban planning and the location of the mine tailing pond,you must take full account of the factors of the tailings impact of the accident.According to the impact of the tailings dam failure, Layout of mining area, determinethe location of the tailing pond.(3) Through calculated the probability of the tailings dam break withnumerical simulation. if the the Shannan tailings dam break, may cause the arableland is damaged or destroyed industrial facilities, exquisite river tributariescontaminated Under the discharge sand was fan-shaped distribution, whileconstrained by topography along the trench, the low-lying river forward, andgradually expand the coverage area over time, The quicksand ultimately coverdownstream of the dam farmland, flood an area of about90.12hm2in reachdownstream of the dam in the downstream area of about1.5kmat. Sphere of influenceto the more serious range of1km of the dam breaks downstream of the impact toMine Gold production area (approximately300m) from the tailings repository,affecting400of the population.(4) That，geological hazard rarely happen in Shandong Gold Group Co., Ltd.Dongfeng mining project. Through we forecast, Geological disasters level wasmedium caused by engineering construction. Forecast construction projects may besubject to geological disasters, the potential for harm is small; Geological Hazardcomprehensive assessment of the risk of medium.