干堆尾矿库坝体稳定性研究与应用

发布时间：2018-05-16 09:58

本文选题：干堆尾矿库 + 尾细砂　；参考：《石家庄铁道大学》2014年硕士论文

【摘要】：随着人民越来越注重尾矿库的安全性和环保问题，如何提高尾矿坝体稳定性、增加库容量已成为亟待解决的问题。干堆尾矿库因其尾矿材料脱水碾压、库内不存水、无明显渗流作用等诸多优点，逐渐成为各地采用的尾矿库筑坝方式。同时，干堆尾矿库可在保证尾矿坝体稳定性的前提下，增加库容量，有效的解决了尾矿库稳定性和环保两大问题，不仅降低了下游人民和企业的生命财产安全遭受损害的风险，而且提高了占地利用率，实现了扩容的目的。因此，研究干堆尾矿库坝体稳定性及其适用性，并使干堆技术得到广泛推广，是一项有着巨大社会效益的工作。本文旨在研究干堆尾矿库坝体稳定性，并将分析结果应用于干堆尾矿库工程实例，实现安全性与库容量的双赢。目前，由于我国还没有颁布针对干堆尾矿库的设计规范，含水率、碾压程度、堆筑高度、坡度均无规范可依。在此背景下，本论文进行了以下有益的工作： (1)针对不同的矿物类型及矿物成分，，本文对归纳为尾细砂、尾粉砂、尾粉土三种不同的尾矿材料进行各种物理力学试验，得出不同含水率、不同相对密度(压实系数)对应下的抗剪强度参数。 (2)根据实验得出的参数，采用STAB土质边坡稳定分析程序，对不同的尾矿材料、对尾矿坝剖面进行抗滑稳定性分析，并得出不同含水率、密实度对应下的抗滑稳定安全系数分布规律。 (3)在相同尾矿库背景环境下，分析堆积高度、堆积坡度和地震烈度对干堆尾矿库坝体稳定性的影响速度。同时采用传统尾矿库工程实例，与干堆尾矿库坝体稳定性进行对比，分析尾矿库内水对坝体稳定性影响程度。 (4)对干堆尾矿库工程实例的初步设计方案进行了分析并提出了有益建议，可使尾矿库的有效库容得到扩充，对干堆尾矿库的设计具有指导性意义。
[Abstract]:With the people pay more and more attention to the safety and environmental protection of the tailings dam, how to improve the stability of the tailing dam body and increase the reservoir capacity has become an urgent problem to be solved. Because of its advantages such as dehydration and compaction of tailings material, no water in the reservoir and no obvious seepage, the dry pile tailing reservoir has gradually become a kind of dam construction method used in various places. At the same time, on the premise of ensuring the stability of the tailings dam body, the dry pile tailings reservoir can increase the capacity of the tailings dam, effectively solve the two major problems of the stability of the tailings reservoir and environmental protection, and not only reduce the risk of damage to the life and property safety of the downstream people and enterprises, but also reduce the risk of damage to the life and property of the downstream people and enterprises. Moreover, it improves the utilization rate of land occupation and realizes the purpose of capacity expansion. Therefore, it is a work of great social benefit to study the stability and applicability of the dam body of the dry reactor tailings reservoir, and to make the dry reactor technology widely spread. The purpose of this paper is to study the stability of the dam body of the dry reactor tailing reservoir and apply the analysis results to the engineering example of the dry reactor tailings reservoir to realize the win-win situation between the safety and the capacity of the reservoir. At present, there are no specifications for the design of dry pile tailings reservoir in China, such as moisture content, rolling degree, pile height and slope degree. In this context, this paper has carried out the following useful work: 1) aiming at different mineral types and mineral composition, three kinds of tailings materials, including fine sand and silt, have been tested in this paper, and different moisture content has been obtained. Shear strength parameters corresponding to different relative densities (compaction coefficients). 2) according to the parameters obtained from the experiment, the stability of tailings dam profile is analyzed by using STAB soil slope stability analysis program, and the different moisture content is obtained. The distribution law of safety factor of anti-slip stability corresponding to compactness. 3) under the same tailings background environment, the paper analyzes the influence speed of accumulation height, accumulation slope and seismic intensity on the stability of dam body of dry pile tailing reservoir. At the same time, the stability of the dam body is compared with that of the dry pile tailing dam by using the traditional tailing reservoir engineering example, and the influence of the water in the tailing reservoir on the dam stability is analyzed. 4) the preliminary design scheme of the dry pile tailing reservoir is analyzed and some useful suggestions are put forward, which can expand the effective storage capacity of the tailings reservoir and have instructive significance for the design of the dry pile tailing reservoir.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV649;TV223

【参考文献】