本文選題：鐵礦砂 + 徑流量�。� 參考：《山西農(nóng)業(yè)大學(xué)》2015年碩士論文

【摘要】：在坡度為15°,20°和25°,放水流量為1.5L/Min、2.0L/Min和2.5L/Min的情況下,對(duì)鐵礦砂坡面進(jìn)行股流沖刷模擬試驗(yàn),研究其產(chǎn)流產(chǎn)沙規(guī)律、顆粒坡面運(yùn)移特征及水沙關(guān)系。研究結(jié)果表明：(1)在穩(wěn)定股流沖刷的作用下,鐵礦砂坡面顆粒運(yùn)移既具有陣發(fā)性和波動(dòng)性,又具有一定程度的跳躍性、突發(fā)性。(2)由試驗(yàn)結(jié)果可知,不同坡度和流量的坡面產(chǎn)沙量均會(huì)隨著坡度和流量的增加而增大,按其大小排序?yàn)椋篗25。M20。M15°,M2.5L/minM2.0L/min M1.5L/min;徑流量按其大小排序?yàn)椋篞25°Q20°Q15° Q2.5L/min Q2.0L/min Q1.5L/min;但當(dāng)流量為2.5L/min時(shí),Q20。Q25。Q15。。(3)坡面產(chǎn)流時(shí)間主要受流量變化影響；在不同坡度和流量梯度下的鐵礦砂帔面顆粒運(yùn)移特征存在明顯的差異性。小坡度、低流量條件下,坡面顆粒運(yùn)移主要分為三個(gè)階段：前期蠕動(dòng)變形階段、中期侵蝕運(yùn)移階段和后期穩(wěn)定運(yùn)移階段。大坡度、高流量條件下,主要有大規(guī)模滑落侵蝕運(yùn)移和穩(wěn)定運(yùn)移兩個(gè)階段,坡面顆粒運(yùn)移的突發(fā)性更為明顯和強(qiáng)烈。(4)對(duì)試驗(yàn)數(shù)據(jù)進(jìn)行統(tǒng)計(jì)分析,不同坡度與流量下坡面累積產(chǎn)沙量與累積徑流量均呈現(xiàn)較好的冪函數(shù)關(guān)系：y=axb;在小流量作用下,坡度的變化對(duì)坡面侵蝕量的貢獻(xiàn)較為顯著,而隨著流量的增大,坡度已不再是坡面侵蝕量增大的主因。
[Abstract]:Under the conditions of 15 擄/ 20 擄and 25 擄, and the discharge rate of 1.5L / min 2.0L / Min and 2.5L/Min, the runoff scour simulation test was carried out on the slope of iron ore to study the regularity of runoff and sediment yield, the migration characteristics of granular slope and the relationship between water and sediment. The results show that the particle migration on the slope of iron ore is both paroxysmal and fluctuating under the action of steady stream scouring. The sediment yield increased with the increase of slope and flow rate. The order of runoff is: M25.M20.M15 擄, M2.5L- / minM2.0L / min, M1.5L / min; runoff: Q25 擄Q20 擄Q15 擄Q2.5L/min Q2.0L/min Q1.5L / min; but when flow rate is 2.5L/min, runoff time is mainly affected by flow rate change. There are obvious differences in grain migration characteristics of iron ore frame surface under different slope and flow gradient. Under the condition of small slope and low flow rate, the grain migration on the slope can be divided into three stages: the early creep stage, the intermediate erosion migration stage and the late stable migration stage. Under the condition of large slope and high flow, there are two stages of large scale sliding erosion migration and stable migration, and the sudden occurrence of grain migration on slope surface is more obvious and strong. There is a good power function relationship between the cumulative sediment yield and the cumulative runoff under different slope and flow rate. Under the action of small flow, the slope change has a significant contribution to the slope erosion, but with the increase of the flow rate, The slope is no longer the main reason for the increase of erosion on the slope.
【學(xué)位授予單位】：山西農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：S157.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 李德平,張玉梅,方繼臣,殷慶范,張谷田;矸石山水土流失規(guī)律與防治措施的研究[J];水土保持研究;2001年03期

2 張華明,彭冬水,奚同行;高速公路棄土棄渣防治技術(shù)探討[J];水土保持研究;2005年04期

3 吳普特,周佩華;地表坡度對(duì)雨滴濺蝕的影響[J];水土保持通報(bào);1991年03期

4 鄭粉莉;唐克麗;周佩華;;坡耕地細(xì)溝侵蝕的發(fā)生、發(fā)展和防治途徑的探討[J];水土保持學(xué)報(bào);1987年01期

5 朱波,莫斌,汪濤,徐泰平,高美榮;紫色丘陵區(qū)工程建設(shè)松散堆積物的侵蝕研究[J];水土保持學(xué)報(bào);2005年04期

6 郭振世;仵顏卿;;尾礦庫水土流失預(yù)測(cè)及控制研*究[J];水土保持學(xué)報(bào);2009年04期

7 白中科,王文英,李晉川,盧崇恩;黃土區(qū)大型露天煤礦劇烈擾動(dòng)土地生態(tài)重建研究[J];應(yīng)用生態(tài)學(xué)報(bào);1998年06期

，

本文編號(hào)：1834425