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尾礦庫潰壩災害防控現狀及發展

Status and development for the prevention and management of tailings dam failure accidents

  • 摘要: 尾礦庫潰壩災害應急響應時間短、潛在威脅巨大,往往造成慘重人員傷亡與巨額財產損失. 近些年尾礦庫安全事故發生數量的總體下降趨勢充分體現出現代化技術及安全管理方面的進步,然而重大事故發生頻次卻不減反增,2015年巴西Samarco鐵礦與2014年加拿大Mount Polley重大潰壩事故及其慘重后果,再次為尾礦庫安全敲響警鐘. 我國現存尾礦庫8869座,含"頭頂庫"1425座,安全形勢復雜. 本文在收集大量相關領域文獻的基礎上,聚焦尾礦庫潰壩災害防控體系中的安全監測、災害預警與應急準備、安全管理與標準規范這三大方面核心內容,分別綜述對比國內外現狀及前沿進展,探討分析我國當前所面臨的問題并嘗試提出改進建議,為尾礦庫防災減災理論研究與技術革新提供參考. 結果表明:(1)我國尾礦庫安全監測標準更高,但儀器耐久性、可靠度與實用性不足,專用監測器件與新技術的研發應用勢在必行;(2)災害預警方法單一且可信度不高,而信息技術融合應用成為發展趨勢;(3)應急管理與預警決策需以充分的科學論證為基礎,當前研究在試驗手段與計算方法上存在局限;(4)我國擁有完善的安全管理標準規范體系,但在安全等別劃分、全生命周期管理、主體變更、事故總結等方面相對欠缺.

     

    Abstract: Tailings dam failure accidents with limited emergency response time and substantial potential threats often lead to heavy casualties and severe financial losses. In recent years, the decreasing trend of tailings dam failure accidents shows the development of modern technology and safety management. However, the frequency of major tailings dam failure accidents has increased, rather than decreased. The 2015 Samarco Accident in Brazil and the 2014 Mount Polley Accident in Canada, along with their disastrous consequences, once again sounded the alarm to improve the safety of tailings ponds. China is now facing a complicated safety situation because there are 8869 tailings ponds throughout the country, including 1425 overhead tailings ponds that represent the tailings ponds located within 1 km upstream of residential areas, workshops, schools, or other important facilities. Based on a large number of relevant research studies, focusing on three main aspects of accident prevention and management that include safety monitoring, early-warning and emergency preparation, safety management codes and standards, the status and frontier progress are reviewed in this paper. Furthermore, the relevant problems in China are discussed, and several improvement recommendations are presented that can provide a reference for theoretical research and technological innovation for preventing tailings pond accidents. The results are as follows:(1) The safety monitoring standards in China are relatively strict. However, the monitoring instruments lack stability, reliability, and practicability. Thus, specific devices and new technologies need to be developed. (2) The current early-warning method lacks diversity and reliability, and using information technology in interdisciplinary applications is becoming the developing trend. (3) The emergency management and decision-making should be based on sufficient scientific proof. However, the relevant research is limited by test methods and simulating algorithms. (4) Lastly, China has established a complete system of safety management codes and standards, but with the current problems of safety level classification, life-cycle management, change management process, and accident investigation, greater progress is needed.

     

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