本文關(guān)鍵詞： 尾礦庫 逐漸潰壩 挾沙力 高含沙水流 Fluent　出處：《昆明理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：本文根據(jù)現(xiàn)有的逐漸潰壩過程所描述的理論成果,將一般數(shù)值計(jì)算與Fluent流體軟件相結(jié)合,建立了一個(gè)適用于較厚壩體的漫頂逐漸潰壩過程理論與數(shù)值模擬方法,并將該方法應(yīng)用到尾礦壩潰決計(jì)算中,獲得的計(jì)算結(jié)果與一些學(xué)者的過程描述和試驗(yàn)表征有一定相似之處,從而填補(bǔ)了尾礦壩逐漸潰決研究的些許空白。本文的研究?jī)?nèi)容主要有： 1.分析了尾礦庫中形成干灘面的溢流尾礦和用于筑壩的沉砂尾礦的一般屬性,并結(jié)合泥沙的性質(zhì)和在水流中的運(yùn)動(dòng)特性,總結(jié)出尾砂泄流過程中的相關(guān)特點(diǎn),為形成尾砂泄流過程的理論和后續(xù)模擬打下理論基礎(chǔ)。 2.利用一般水閘沖刷泄流過程中水面和床沙面變化的規(guī)律,建立了尾砂在干灘面沖刷的相關(guān)理論,概括出尾礦壩潰決水流特點(diǎn)及尾砂床面變化的規(guī)律,并給出了砂床高程變化的計(jì)算方法； 3.討論了尾礦壩局部瞬間潰決形成高含沙水流的可能性,同時(shí)指出瞬間局部潰壩可利用高含沙水溯源沖刷的計(jì)算方法。 4.在前人總結(jié)出尾礦壩逐漸潰決過程描述的基礎(chǔ)上,綜合考慮了尾砂流動(dòng)特性、潰壩水流特性、以及沖刷和床面變化規(guī)律,建立了尾礦壩潰決過程理論模型和數(shù)值模擬方法,應(yīng)用到以龍都尾礦庫為原型的中線法堆積壩計(jì)算中,在660s的計(jì)算時(shí)間內(nèi),潰口最大下切深度為35.8m,橫向?qū)挾仍黾?8.1m,泄流尾礦共2472m3,驗(yàn)證了計(jì)算方法的可行性。 5.根據(jù)潰壩泄流量和泄流時(shí)間,利用三維Fluent中的動(dòng)網(wǎng)格技術(shù)和UDF技術(shù),以一定比例構(gòu)建了潰口逐步變化的尾礦泄流模型,實(shí)現(xiàn)了尾礦壩逐漸潰決過程的尾砂流動(dòng)模擬。 6.根據(jù)龍都尾礦庫的地形特點(diǎn)建立了下游河道的幾何模型,利用三維Fluent模擬了瞬間全部潰決后的尾砂在360s內(nèi)的行進(jìn)情況,并分析其后續(xù)流動(dòng)情況。
[Abstract]:Based on the theoretical results described by the existing gradual dam break process and combining the general numerical calculation with the Fluent fluid software, a theory and numerical simulation method for the overtopping process of the dam body is established in this paper, which is suitable for the thicker dam body. The method is applied to tailing dam collapse calculation, and the calculated results are similar to the process description and experimental characterization of some scholars. Thus filling up some gaps in the study of tailing dam collapsing gradually. The main contents of this paper are as follows:. 1. The general properties of overflow tailings forming dry beach surface in tailings reservoir and sand sinking tailings used in dam construction are analyzed. Combining with the characteristics of sediment and movement in water flow, the relevant characteristics of tailings discharge process are summarized. It lays a theoretical foundation for the formation of the theory and subsequent simulation of tailings discharge process. 2. Based on the change of water surface and bed sand surface during sluice erosion, the relevant theory of tailing sand scouring on dry beach surface is established, and the characteristics of tailing dam collapsing flow and the changing law of tailings bed surface are summarized. The calculation method of sand bed height variation is also given. 3. The possibility of local instantaneous collapse of tailings dam to form high sediment flow is discussed, and the calculation method of instantaneous local break can be used to trace the source of high sediment water. 4. On the basis of summing up the description of tailing dam collapsing process, considering the characteristics of tailing sand flow, dam break flow, scour and bed surface change, the theoretical model and numerical simulation method of tailing dam collapse process are established. In the calculation of the mid-line stacking dam with Longdu tailings reservoir as the prototype, the maximum undercutting depth of the crater is 35.8m, the transverse width is increased by 18.1 m, and the discharge tailings is 2472m3 in the calculation time of 660s, which verifies the feasibility of the calculation method. 5. According to the discharge and discharge time of dam break, using the dynamic grid technology and UDF technology in 3D Fluent, a tailings discharge model with a certain proportion is constructed, and the tailings flow simulation of tailing dam collapsing process is realized. 6. According to the topographic characteristics of the tailings reservoir in Longdu, the geometric model of the downstream channel is established, and the movement of the tailings after the instantaneous collapse is simulated by using 3D Fluent, and the subsequent flow is analyzed.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TV649

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 方森松;劉曉平;吳國君;周千凱;乾東岳;;低水頭水利樞紐泄水閘閘前沖刷研究[J];長江科學(xué)院院報(bào);2011年06期

2 徐克;趙云勝;張強(qiáng);;尾礦庫潰壩后果數(shù)值分析[J];工業(yè)安全與環(huán)保;2012年10期

3 魏勇;許開立;;尾礦壩漫頂潰壩機(jī)理及過程研究[J];金屬礦山;2012年04期

4 錢寧,萬兆惠,錢意穎;黃河的高含沙水流問題[J];科學(xué)通報(bào);1979年08期

5 郭朝陽;唐治亞;;尾礦庫潰壩模型探討[J];中國安全生產(chǎn)科學(xué)技術(shù);2010年01期

6 萬兆惠,宋天成,何青;水壓力對(duì)細(xì)顆粒泥沙起動(dòng)流速影響的試驗(yàn)研究[J];泥沙研究;1990年04期

7 張跟廣;水庫溯源沖刷模式初探[J];泥沙研究;1993年03期

8 竇國仁;再論泥沙起動(dòng)流速[J];泥沙研究;1999年06期

9 王兆印,黃金池,蘇德惠;河道沖刷和清水水流河床沖刷率[J];泥沙研究;1998年01期

10 王兆印,徐永年,蘇曉波;挾沙水流的沖刷率及河床慣性的研究[J];泥沙研究;1998年02期

，

本文編號(hào)：1537681