發(fā)布時間：2018-04-20 03:06

  本文選題：尾礦庫 + 排水固結(jié)��； 參考：《廣西大學(xué)》2015年碩士論文

【摘要】：尾礦庫作為一種特殊的工業(yè)建筑,是礦山企業(yè)生產(chǎn)必不可少的基礎(chǔ)設(shè)施,但亦是一種高危人造泥石流危險源。由于特殊的尾礦堆排工藝及貯存環(huán)境,造成尾礦庫內(nèi)常年積水嚴重、礦泥固結(jié)程度極低、壩體浸潤線偏高,以致壩體坍塌、巖溶區(qū)排泥庫泥漿泄漏甚至潰壩等尾礦庫災(zāi)害事故頻發(fā)。本文從加速庫內(nèi)尾礦堆積體排水固結(jié)角度出發(fā),在分析尾礦庫堆排運行環(huán)境特征的基礎(chǔ)上,建立以土工復(fù)合排水材為豎向排水通道的逐級堆排尾礦加速排水固結(jié)物理模型,并基于該模型采用自行研制設(shè)計的試驗裝置對尾礦排水固結(jié)過程進行了試驗?zāi)�擬。研究果表明：(1)在尾礦泥漿逐級堆排條件下,土工復(fù)合排水材排水速率符合自回歸移動平均模型：ARMA(2,1,8)×(0,0,0),模型后期預(yù)測結(jié)果顯示：最大排水量呈逐漸增大的趨勢,遠未達到實際排水量峰值,排水性能滿足尾礦庫排水要求；(2)在土工復(fù)合排水材的排水條件下,上層覆水及時排干為后期的尾礦固結(jié)提供了有利條件,尾礦泥漿停止堆排104天后尾礦泥漿平均應(yīng)力固結(jié)度達62.32%-70.81%,平均應(yīng)力固結(jié)度可達61.27%～68.91%,排水條件下礦泥含水率低于靜置不排水情況25%左右,固結(jié)效果明顯；(3)對尾礦理想孔隙滲流模型分析可知,尾礦泥漿逐級堆排情況下土工復(fù)合排水材料最大影響半徑是一個隨時間改變值,其最大影響半徑可達6.34～8.65m�；�于尾礦庫特點及模型試驗結(jié)果,從“可隨庫面自動升高”及“快速高效排水固結(jié)”兩大核心問題出發(fā),研制一種可隨尾礦庫自動升高排水固結(jié)裝置。選取穩(wěn)性指標(biāo)最高的圓柱底面(靜穩(wěn)性力臂0.18m)作為浮體計算優(yōu)化剖面,并采用CATIA對裝置進行詳細的三維設(shè)計,對裝置的浮性、穩(wěn)性及靜強度進行了計算校核。最后,基于試驗結(jié)果及裝置特征確定了裝置的布設(shè)參數(shù)及布設(shè)形式,對新型尾礦庫的庫內(nèi)排水系統(tǒng)進行總體設(shè)計,為該裝置的實際工程應(yīng)用提供參考。本文研究成果可為尾礦庫災(zāi)害防治提供一種新的途徑。
[Abstract]:As a special industrial building, tailings reservoir is an essential infrastructure for mining enterprises, but it is also a dangerous source of high risk man-made debris flow. Due to the special tailings heap and drainage technology and storage environment, the tailings reservoir has serious accumulated water all the year round, the consolidation degree of the slime is very low, and the infiltration line of the dam body is on the high side, resulting in the collapse of the dam body. Mud leakage and dam break occur frequently in tailings reservoir in karst area. In this paper, from the point of view of accelerating the drainage consolidation of tailings accumulation body in the reservoir, based on the analysis of the characteristics of the operation environment of the pile discharge in the tailings reservoir, a physical model of accelerated drainage consolidation of the tailings is established, in which the geotechnical composite drainage material is used as the vertical drainage channel, and the physical model of the accelerated drainage consolidation of the tailings is established. Based on the model, the tailings drainage consolidation process was simulated with a self-designed test device. The results show that the drainage rate of geotechnical composite drainage materials is in accordance with the autoregressive moving average model: 1 / ARMA-2 / 1 / 1 / 0) under the condition of tailings mud discharge by stage by step. The prediction results of the late stage of the model show that the maximum displacement is increasing gradually. Far from reaching the peak value of actual discharge, the drainage performance meets the drainage requirement of tailings reservoir. Under the drainage condition of geo-engineering composite drainage material, the overlying water in the upper layer is drained in time to provide favorable conditions for the tailings consolidation in the later stage. The average stress consolidation degree of tailings mud is 62.32-70.81d after the tailings mud is stopped for 104 days, and the average stress consolidation degree can reach 61.270.27% and 68.91% respectively, and the water content of the tailings mud is about 25% lower than that of statically undrained mud under drainage conditions. The analysis of the ideal pore seepage model of tailings shows that the maximum influence radius of the soil composite drainage material is a value varying with time, and the maximum influence radius can reach 6.34 ~ 8.65 m. Based on the characteristics of tailings reservoir and the results of model test, a drainage consolidation device is developed based on the two core problems of "can rise automatically with the surface of the reservoir" and "fast and high efficiency drainage consolidation". The bottom surface of the cylinder with the highest stability index (static force arm 0.18m) is selected as the optimization section of the floating body calculation. The detailed three-dimensional design of the device is carried out by using CATIA, and the floatability, stability and static strength of the device are calculated and checked. Finally, based on the test results and the characteristics of the device, the layout parameters and layout form of the device are determined, and the overall design of the drainage system in the new tailing reservoir is carried out, which provides a reference for the practical application of the device. The research results in this paper can provide a new way for disaster prevention of tailings reservoir.
【學(xué)位授予單位】：廣西大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD926.4

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本文編號：1775943