【摘要】：尾礦庫(kù)是整個(gè)國(guó)民經(jīng)濟(jì)發(fā)展中的重要生產(chǎn)設(shè)施,其壩體的穩(wěn)定安全運(yùn)行,在礦山生產(chǎn)中有著重要的意義。尾礦庫(kù)排滲失效是引起尾礦庫(kù)潰壩的重要原因之一。由于我國(guó)許多尾礦庫(kù)的設(shè)計(jì)不規(guī)范,管理不妥善等,造成了重大的尾礦庫(kù)安全隱患�；诖嗽�,本文以承德平泉縣某尾礦庫(kù)為原型,相似理論為基礎(chǔ),利用自主設(shè)計(jì)搭建的潰壩平臺(tái),完成了尾礦庫(kù)潰體演進(jìn)規(guī)律物理模型試驗(yàn),對(duì)潰壩過(guò)程中的破壞模式及破壞形式進(jìn)行了描述,并著重分析了其破壞機(jī)理。完成的相關(guān)工作以及取得的成果如下:(1)對(duì)國(guó)內(nèi)外尾礦庫(kù)研究方法及研究進(jìn)展進(jìn)行了總結(jié),并以模型試驗(yàn)與數(shù)值模擬研究為切入點(diǎn),介紹了相似理論及壩體穩(wěn)定性分析理論。(2)根據(jù)實(shí)際尾礦庫(kù)資料,基于相似理論,進(jìn)行了模型砂的選取和模型平臺(tái)的設(shè)計(jì)與搭建工作。(3)結(jié)合實(shí)際資料,在潰壩平臺(tái)上完成了對(duì)尾礦庫(kù)模型的搭建,并進(jìn)行了高水位工況下,尾礦庫(kù)潰壩模型試驗(yàn)。對(duì)試驗(yàn)過(guò)程中出現(xiàn)的現(xiàn)象進(jìn)行了描述,總結(jié)了整個(gè)試驗(yàn)過(guò)程中的潰決模式及破壞形式。結(jié)果表明,潰決整體呈逆流牽引型潰決模式。在潰決破壞形式大致可以分為三大類:流土破壞形式、崩塌破壞形式和滑坡破壞形式。通過(guò)分析壩面潰決區(qū)域的尺寸發(fā)展,得出了流土破壞及崩塌破壞是引起滑坡破壞階段的誘發(fā)階段,滑坡破壞過(guò)程潰決量大、持續(xù)時(shí)間短,在運(yùn)營(yíng)過(guò)程中應(yīng)格外提防。(4)運(yùn)用Midas/GTS有限元軟件,通過(guò)強(qiáng)度折減理論對(duì)壩體的穩(wěn)定性進(jìn)行了分析,并得出了壩體的等效塑性應(yīng)變區(qū),進(jìn)而得到整個(gè)壩體的潰決量,與模型試驗(yàn)所得的結(jié)果吻合,證明了數(shù)值模擬方法的可行性。通過(guò)對(duì)試驗(yàn)過(guò)程中現(xiàn)象及機(jī)理的分析總結(jié),指出了尾礦庫(kù)在設(shè)計(jì)及運(yùn)營(yíng)過(guò)程中需要格外注意的薄弱環(huán)節(jié)。為相關(guān)工作人員提供了參考,為尾礦庫(kù)的安全穩(wěn)定運(yùn)行提供了可靠的依據(jù)。
[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.
【學(xué)位授予單位】：石家莊鐵道大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TV649;TV122.4

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本文編號(hào)：2497994