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首页> 外文会议>Sixth International Conference on Environmental Issues and Management of Waste in Energy and Mineral Production Swemp 2000, May 30-Jun 2, 2000, Calgary, Alberta >Stability analysis of an abandoned open pit mine for landfill design
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Stability analysis of an abandoned open pit mine for landfill design

机译：废弃露天矿场填埋场设计的稳定性分析

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摘要

The paper discusses the results of a stability analysis carried out in a mining area that has been considered for the disposal of the slag produced in a nearby smelter. Although the site is suitable for this purpose owing to the presence of an abandoned pit having a potential storage volume of about 1.5 million tonnes, some risks of potential instability have been identified, related to the steepness of the pit slope, often consisting of poor and weathered rocks and to the presence underground openings below. The vertical displacement of the fill layer to be placed inside the pit for the sake of bottom and walls shaping represents a further problem. The stability has been assessed through the limit equilibrium and stress-strain analyses. The possibility of increasing the safety conditions and safeguarding the integrity of the landfill barrier system has been proved through an iterative check of landfill design in face of the results of stability analysis. The implementation of numerical computer models showed that the critical aspects are the shear and the bulk modulus of the backfill material. A special attention has also been devoted to the subsidence history of underground openings and to the predictable displacement of the loose materials involved (backfill, shaping and barrier layers, disposed of slag).
机译：本文讨论了在矿区进行的稳定性分析的结果，该矿区已被考虑用于处置附近冶炼厂产生的矿渣。尽管由于存在一个潜在的存储量约为150万吨的废弃坑而使该场地适合于此目的，但已发现了一些与坑坡陡峭有关的潜在不稳定风险，通常由较差的坡度和风化的岩石和下面的地下开口。为了使底部和壁成形，要放置在凹坑内的填充层的垂直位移代表了另一个问题。通过极限平衡和应力应变分析评估了稳定性。面对稳定性分析的结果，通过对填埋场设计进行反复检查，已经证明了增加安全条件和维护填埋场屏障系统完整性的可能性。数值计算机模型的实施表明，关键方面是回填材料的剪切力和体积模量。还特别注意了地下开口的沉降历史以及所涉及的松散材料（回填，成型和阻挡层，已弃渣）的可预测位移。

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