本文選題：濕堆尾礦庫 + 降雨入滲��； 參考：《西南科技大學》2016年碩士論文

【摘要】：本論文旨在研究濕堆尾礦庫的降雨入滲效應及潰壩影響。論文以四川某尾礦庫為工程背景,利用相似模擬試驗和數(shù)值模擬相結合的方式進行研究。首先通過降雨砂槽模型探究得出降雨入滲發(fā)展過程中入滲效應導致的壩體破壞表現(xiàn)為四個階段:表面沼澤化—產(chǎn)生小范圍橫向裂縫—滑移面上移—大面積破壞,在此過程中堆積壩外坡越陡壩體含水率和孔隙壓力變化越明顯且與降雨強度呈正相關;利用水分垂直入滲試驗歸納總結出入滲深度隨著降雨強度的增加而增大,試驗得出的不同工況條件下的入滲深度是數(shù)值模擬計算的數(shù)據(jù)基礎;然后,采用數(shù)值模擬得出了壩體隨入滲深度變化響應規(guī)律:壩體的穩(wěn)定性、滑坡埋深與長度隨降雨強度增大,壩體的破壞成壩腳—壩坡—壩頂—干灘的發(fā)展趨勢,與砂槽模型試驗結果相一致;最后,按照1:200的比尺設置戶外尾礦庫型泥石流的相似模擬試驗,歸納總結出潰壩泥石流的影響性與不同潰壩程度總體成正相關,且粗糙程度越低泥石流的影響性越大。通過以上內容研究,完成了降雨過程中濕堆尾礦庫的入滲效應,壩體的破壞規(guī)律以及潰壩后泥石流的影響性研究,從而得出降雨入滲效應—破壞規(guī)律—潰壩影響評估的閉環(huán)工程應用研究,具有十分重要的工程應用意義。
[Abstract]:The purpose of this paper is to study the effect of rainfall infiltration and dam break on wet pile tailings. Based on the engineering background of a tailings reservoir in Sichuan province, the similar simulation test and numerical simulation are used in this paper. Firstly, by exploring the model of rainfall sand trough, it is concluded that the dam body failure caused by infiltration effect in the process of rainfall infiltration development is manifested in four stages: surface swamping, producing a small range of transverse cracks, moving up the slip plane and destroying a large area. In this process, the change of water content and pore pressure in the steeper slope of the pile dam is more obvious and positively correlated with the rainfall intensity, and the infiltration depth increases with the increase of rainfall intensity by using the vertical infiltration test of water. The depth of infiltration under different working conditions is the data base of numerical simulation. Then, the response law of dam body with infiltration depth is obtained by numerical simulation: the stability of dam body, the stability of dam body, The buried depth and length of landslide increase with rainfall intensity, and the development trend of dam body failure is the same as that of sand trough model test, and the development trend of dam body is formed by dam foot, dam slope, dam crest and dry beach. According to the similarity simulation test of setting up scale of 1: 200 scale for outdoor tailings reservoir type debris flow, it is concluded that the influence of dam-break debris flow is positively correlated with different dam-break degree, and the lower the roughness is, the greater the influence of debris flow is. Through the above research, the infiltration effect of wet pile tailings during rainfall, the damage law of dam body and the influence of debris flow after dam break are studied. Therefore, the closed-loop engineering application study of rainfall infiltration effect, failure law and dam break impact assessment is of great significance.
【學位授予單位】：西南科技大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TD926.4
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本文編號：1928780