Performance of bituminous geomembrane in mining applications

沥青土工膜在采矿应用中的性能

• 批准号: 505527-2016
• 负责人: Rowe, RKerry
• 金额: $ 0.65万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=618054
• 关键词: Performance; bituminous; geomembrane; mining; applications

Management of mining waste in both a safe and environmentally acceptable manner is essential for continued activity in this important sector of Canada's economy-worth $57B in 2014. A special feature about these mining applications is the considerably high vertical stresses imposed on the geosynthetic liner that can result in puncturing the thin plastic liner and migration of the containment of the harmful chemicals to the surrounding environment. Thicker and yet flexible liners such as Bituminous Geomembranes (BGMs) are often considered to be favourable for such applications and currently used despite a lack of knowledge of their behaviour. A recent research contract by the applicants and industry partner, Titan, initiated a very preliminary investigation into the puncture resistance of BGMs and is expected to be of significant benefit of exploring their physical response under stresses in mining application. Industry also needs to know how well BGMs can resist degradation compared to the traditional polymeric geomembranes and how effective BGM sheets can be welded on site without providing a weak zone between BGM panels to ensure the long-term performance of such liners in reducing subsurface seepage from the mining storage facilities into the surrounding environment. The proposed research will use industrial funding to conduct fundamentally new experiments to assess BGM aging with time and possible change in its properties together with the physical and the chemical response of BGM welds. NSERC funding will be used to: (1) understand the fundamental mechanism by which puncturing occurs or, alternatively, what are the mechanism by which BGM resist leakage in situations where traditional polymeric geomembranes do puncture and leak; (2) explore how best to evaluate the long-term effectiveness of the seams between adjacent panels of BGM; (3) investigate how best to evaluate the service life of a BGMs. The new research will enable more effective and economical environmental protection for mining waste and will provide advanced training for a Masters and a PhD student. .

以安全和环境可接受的方式管理采矿废物对于加拿大经济这一重要部门的持续活动至关重要-2014年价值570亿美元。这些采矿应用的一个特点是施加在土工合成衬里上的相当高的垂直应力，这可能导致刺穿薄塑料衬里并将有害化学品的容器迁移到周围环境中。较厚且柔性的衬垫，例如沥青土工膜（BGM），通常被认为有利于此类应用，并且尽管缺乏对其行为的了解，但目前仍在使用。申请人和行业合作伙伴Titan最近签订的一项研究合同对BGM的抗穿刺性进行了非常初步的调查，预计将对探索其在采矿应用中的应力下的物理反应产生重大益处。行业还需要知道与传统聚合物土工膜相比，BGM能够抵抗降解的程度如何，以及在不提供BGM板之间的薄弱区的情况下，如何有效地在现场焊接BGM板，以确保这种衬垫在减少从采矿储存设施到周围环境的地下渗漏方面的长期性能。拟议的研究将使用工业资金进行全新的实验，以评估BGM随时间的老化及其特性的可能变化以及BGM焊接的物理和化学反应。NSERC的资金将用于：（1）了解刺穿发生的基本机制，或者，在传统聚合物土工膜刺穿和泄漏的情况下，BGM抵抗泄漏的机制是什么;（2）探索如何最好地评估BGM相邻面板之间接缝的长期有效性;（3）调查如何最好地评估BGM的使用寿命。这项新研究将使采矿废物的环境保护更加有效和经济，并将为硕士和博士生提供高级培训。.