International Workshop on Seismic Stability of Tailings Dams

尾矿坝地震稳定性国际研讨会

• 批准号: 0302358
• 负责人: Xiangwu Zeng
• 金额: $ 7.03万
• 依托单位: Case Western Reserve University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-01-01 至 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0302358&HistoricalAwards=false
• 关键词: International; Workshop; Seismic; Stability; Tailings

This action is to provide partial support for an International Workshop on Seismic Stability of Tailings Dams, being jointly organized and sponsored by the National Science Foundation, the Office of Surface Mining (a bureau of the U.S. Department of the Interior), and the Mine Safety and Health Administration (an agency within the Department of Labor). Tailings dams are the residue of the milling process used to extract materials of interest from mined ores. They are characterized by hydraulically placed fills held in place by an embankment. Failure of tailings dams due to earthquakes has occurred many times in the past in several Pacific Rim earthquake-prone countries, causing significant loss of property and human lives, as well as severe environmental problems. According to the most current data supplied to the National Inventory of Dams, there are 860 coal-mining related dams in the United States. Of these, 232 are considered to have a high hazard-potential by FEMA's hazard rating system, indicating that failure would be reasonably likely to result in loss of life and significant property damage. The vast majority of these high-hazard-potential dams are coal refuse tailings dams located in the Appalachian Coal Field. A few are over 200 m (600 feet) high. Failure of such a structure due to earthquake loading would be catastrophic. Even though considerable progress has been made in seismic design and analysis of earth dams, little research has been conducted on the seismic stability of tailings dams. Past research has shown that coal waste materials have mechanical properties quite different from that of most soils. The structure and construction method of tailings dams are very different from conventional earth dams. Therefore, there is an urgent need for research to investigate the stability of tailings dams under earthquake loading, and to develop seismic design procedures suitable for this unique type of structure. This workshop will bring together US and international experts to discuss the critical issues involved. The objectives are: 1) to summarize the current state-of-the-art, and the state-of-the-practice in the design and seismic analyses of tailings dams; 2) to identify research needs; 3) to facilitate communication and collaboration between researchers, government regulatory agencies, and practicing engineers. Within the limits of the required expertise, the organizers will include underrepresented minorities. The workshop will be hosted by the Department of Civil Engineering, Case Western Reserve University in Cleveland, Ohio on 22-23 May 2003. The workshop proceedings will be posted online on the workshop web site and the web sites of the government regulatory agencies.

这项行动是为由美国国家科学基金会、露天采矿办公室（美国内政部下属机构）和矿山安全与健康管理局（劳工部下属机构）联合组织和赞助的“尾矿坝地震稳定性国际研讨会”提供部分支持。尾矿坝是用于从开采的矿石中提取感兴趣的材料的碾磨过程的残留物。它们的特点是水力放置填充物，由堤防保持到位。过去，在几个环太平洋地震多发国家，多次发生了因地震导致的尾矿坝破坏，造成了重大的财产和生命损失，同时也造成了严重的环境问题。根据国家水坝清单提供的最新数据，美国有860座与煤炭开采有关的水坝。其中，有232个被联邦应急管理局的危险等级系统认为具有高危险潜力，这表明故障很可能导致生命损失和重大财产损失。这些高危险性坝绝大多数是位于阿巴拉契亚煤田的煤矸石尾矿坝。有一些超过200米（600英尺）高。这种结构在地震荷载作用下的破坏将是灾难性的。尽管在土坝抗震设计和分析方面取得了长足的进展，但对尾矿坝抗震稳定性的研究却很少。过去的研究表明，煤矸石的力学性质与大多数土壤的力学性质大不相同。尾矿坝的结构和施工方法与传统的土坝有很大的不同。因此，迫切需要研究尾矿坝在地震荷载作用下的稳定性，并制定适合这种独特结构的抗震设计方法。该研讨会将汇集美国和国际专家，讨论所涉及的关键问题。目的是：1)总结尾矿坝设计和地震分析的现状和实践；2)确定研究需求；3)促进研究人员、政府监管机构和执业工程师之间的沟通与合作。在所需专业知识的范围内，组织者将包括代表性不足的少数民族。该研讨会将于2003年5月22日至23日在俄亥俄州克利夫兰的凯斯西储大学土木工程系举办。研讨会会议记录将在研讨会网站和政府监管机构的网站上公布。