尾矿库溃体演进规律模型试验研究
发布时间：2019-06-12 11:43
【摘要】：尾矿库是整个国民经济发展中的重要生产设施,其坝体的稳定安全运行,在矿山生产中有着重要的意义。尾矿库排渗失效是引起尾矿库溃坝的重要原因之一。由于我国许多尾矿库的设计不规范,管理不妥善等,造成了重大的尾矿库安全隐患。基于此原因,本文以承德平泉县某尾矿库为原型,相似理论为基础,利用自主设计搭建的溃坝平台,完成了尾矿库溃体演进规律物理模型试验,对溃坝过程中的破坏模式及破坏形式进行了描述,并着重分析了其破坏机理。完成的相关工作以及取得的成果如下:(1)对国内外尾矿库研究方法及研究进展进行了总结,并以模型试验与数值模拟研究为切入点,介绍了相似理论及坝体稳定性分析理论。(2)根据实际尾矿库资料,基于相似理论,进行了模型砂的选取和模型平台的设计与搭建工作。(3)结合实际资料,在溃坝平台上完成了对尾矿库模型的搭建,并进行了高水位工况下,尾矿库溃坝模型试验。对试验过程中出现的现象进行了描述,总结了整个试验过程中的溃决模式及破坏形式。结果表明,溃决整体呈逆流牵引型溃决模式。在溃决破坏形式大致可以分为三大类:流土破坏形式、崩塌破坏形式和滑坡破坏形式。通过分析坝面溃决区域的尺寸发展,得出了流土破坏及崩塌破坏是引起滑坡破坏阶段的诱发阶段,滑坡破坏过程溃决量大、持续时间短,在运营过程中应格外提防。(4)运用Midas/GTS有限元软件,通过强度折减理论对坝体的稳定性进行了分析,并得出了坝体的等效塑性应变区,进而得到整个坝体的溃决量,与模型试验所得的结果吻合,证明了数值模拟方法的可行性。通过对试验过程中现象及机理的分析总结,指出了尾矿库在设计及运营过程中需要格外注意的薄弱环节。为相关工作人员提供了参考,为尾矿库的安全稳定运行提供了可靠的依据。
[Abstract]:Tailings reservoir is an important production facility in the development of the whole national economy. The stable and safe operation of its dam body is of great significance in mine production. The drainage failure of tailings reservoir is one of the important reasons for dam break of tailings reservoir. Due to the non-standard design and improper management of many tailings reservoirs in China, there are major hidden dangers in the safety of tailings reservoirs. For this reason, based on the similarity theory of a tailings reservoir in Pingquan County, Chengde, this paper completes the physical model test of the evolution law of tailings reservoir collapse by using the dam break platform designed and built by ourselves, describes the failure mode and failure form in the process of dam break, and focuses on the analysis of its failure mechanism. The related work and achievements are as follows: (1) the research methods and research progress of tailings reservoir at home and abroad are summarized, and the similarity theory and dam body stability analysis theory are introduced based on model test and numerical simulation. (2) according to the actual tailings reservoir data, based on similarity theory, the selection of model sand and the design and construction of model platform are carried out. (3) combined with practical data, The model of tailings reservoir is built on the dam break platform, and the dam break model test of tailings reservoir is carried out under the condition of high water level. The phenomena in the course of the test are described, and the collapse mode and failure form in the whole test process are summarized. The results show that the collapse is a countercurrent traction mode as a whole. The failure forms of collapse can be divided into three categories: the failure form of flowing soil, the failure form of collapse and the failure form of landslide. Based on the analysis of the size development of the collapse area on the dam surface, it is concluded that the failure of flowing soil and collapse is the inducing stage of the failure stage of the landslide. The collapse process of the landslide is large and the duration is short. (4) the stability of the dam body is analyzed by using Midas/GTS finite element software and the strength reduction theory, and the equivalent plastic strain zone of the dam body is obtained. Furthermore, the collapse of the whole dam body is obtained, which is in good agreement with the results of the model test, which proves the feasibility of the numerical simulation method. Based on the analysis and summary of the phenomena and mechanisms in the test process, this paper points out the weak links that should be paid special attention to in the design and operation of the tailings reservoir. It provides a reference for the relevant staff and a reliable basis for the safe and stable operation of the tailings 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】：2015
【分类号】：TV649;TV122.4
本文编号：2497994
[Abstract]:Tailings reservoir is an important production facility in the development of the whole national economy. The stable and safe operation of its dam body is of great significance in mine production. The drainage failure of tailings reservoir is one of the important reasons for dam break of tailings reservoir. Due to the non-standard design and improper management of many tailings reservoirs in China, there are major hidden dangers in the safety of tailings reservoirs. For this reason, based on the similarity theory of a tailings reservoir in Pingquan County, Chengde, this paper completes the physical model test of the evolution law of tailings reservoir collapse by using the dam break platform designed and built by ourselves, describes the failure mode and failure form in the process of dam break, and focuses on the analysis of its failure mechanism. The related work and achievements are as follows: (1) the research methods and research progress of tailings reservoir at home and abroad are summarized, and the similarity theory and dam body stability analysis theory are introduced based on model test and numerical simulation. (2) according to the actual tailings reservoir data, based on similarity theory, the selection of model sand and the design and construction of model platform are carried out. (3) combined with practical data, The model of tailings reservoir is built on the dam break platform, and the dam break model test of tailings reservoir is carried out under the condition of high water level. The phenomena in the course of the test are described, and the collapse mode and failure form in the whole test process are summarized. The results show that the collapse is a countercurrent traction mode as a whole. The failure forms of collapse can be divided into three categories: the failure form of flowing soil, the failure form of collapse and the failure form of landslide. Based on the analysis of the size development of the collapse area on the dam surface, it is concluded that the failure of flowing soil and collapse is the inducing stage of the failure stage of the landslide. The collapse process of the landslide is large and the duration is short. (4) the stability of the dam body is analyzed by using Midas/GTS finite element software and the strength reduction theory, and the equivalent plastic strain zone of the dam body is obtained. Furthermore, the collapse of the whole dam body is obtained, which is in good agreement with the results of the model test, which proves the feasibility of the numerical simulation method. Based on the analysis and summary of the phenomena and mechanisms in the test process, this paper points out the weak links that should be paid special attention to in the design and operation of the tailings reservoir. It provides a reference for the relevant staff and a reliable basis for the safe and stable operation of the tailings 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】：2015
【分类号】：TV649;TV122.4
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，本文编号：2497994
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