基于ANSYS的干堆尾礦庫壩體穩(wěn)定性與結(jié)構(gòu)優(yōu)化研究
發(fā)布時間：2018-07-23 07:46
【摘要】：目前,尾礦庫的安全性和環(huán)保性越來越受到重視,干堆尾礦庫由于其建成后庫尾無積水、庫容利用率高等優(yōu)點(diǎn),逐漸得以采用和推廣。然而,現(xiàn)階段我國在設(shè)計(jì)干堆尾礦庫時多沿用傳統(tǒng)濕式尾礦庫的設(shè)計(jì)標(biāo)準(zhǔn),干堆尾礦庫設(shè)計(jì)規(guī)范還有待進(jìn)一步完善,干堆尾礦庫的經(jīng)濟(jì)優(yōu)勢不能得以完全發(fā)揮;同時,隨著尾礦干堆技術(shù)在南方多雨地區(qū)的推廣與應(yīng)用,降雨引發(fā)壩體表面雨水入滲的情況時有發(fā)生,降雨的入滲會影響干堆尾礦庫壩體的穩(wěn)定運(yùn)行,因此,在對干堆尾礦庫穩(wěn)定性進(jìn)行分析時增加降雨入滲下的工況是十分必要的。本論文以云南富民沈家村干堆尾礦庫為工程背景,進(jìn)行了如下研究:(1)結(jié)合干堆尾礦庫工程實(shí)例和理論研究,利用魚刺圖分析影響干堆尾礦庫穩(wěn)定性的各個因素,認(rèn)為導(dǎo)致干堆尾礦庫壩體失穩(wěn)的主要因素包括降雨條件下的雨水入滲、壩體結(jié)構(gòu)參數(shù)的選取和地震的影響。(2)采用ANSYS有限元軟件建立干堆尾礦庫的三維模型,利用強(qiáng)度折減法求解壩體在正常工況下的安全系數(shù),對比計(jì)算收斂與不收斂時壩體的位移場和應(yīng)力場分布,認(rèn)為該尾礦庫在正常工況下能夠穩(wěn)定運(yùn)行且具有較大的安全儲備;同時與瑞典圓弧法的計(jì)算結(jié)果進(jìn)行對比,說明ANSYS強(qiáng)度折減法計(jì)算安全系數(shù)結(jié)果是合理的。(3)研究降雨入滲工況下壩體穩(wěn)定性的變化,利用APDL參數(shù)化語言編寫程序?qū)崿F(xiàn)滲流場和應(yīng)力場的耦合,比較不考慮兩場耦合和考慮兩場耦合時壩體穩(wěn)定性的計(jì)算結(jié)果,并與正常工況下的結(jié)果進(jìn)行對比,認(rèn)為干堆尾礦庫進(jìn)行穩(wěn)定性分析時應(yīng)采用兩場耦合的計(jì)算方法對降雨入滲工況下的壩體進(jìn)行分析。(4)對結(jié)構(gòu)優(yōu)化問題進(jìn)行理論研究,介紹ANSYS優(yōu)化設(shè)計(jì)模塊,建立干堆尾礦庫壩體結(jié)構(gòu)優(yōu)化模型,通過優(yōu)化迭代得到單個設(shè)計(jì)變量和整體目標(biāo)函數(shù)的優(yōu)化結(jié)果,確定同時滿足安全性和經(jīng)濟(jì)性的優(yōu)化方案,并得出各個設(shè)計(jì)變量與狀態(tài)變量之間的關(guān)系。(5)根據(jù)優(yōu)化結(jié)果建立壩體模型,計(jì)算其在正常工況及降雨入滲工況下的穩(wěn)定性,對比優(yōu)化前后壩體位移場和應(yīng)力場的變化,以驗(yàn)證優(yōu)化方案的可靠性。本論文不僅研究了干堆尾礦庫壩體在正常工況和降雨入滲工況下的穩(wěn)定性變化規(guī)律,優(yōu)化了云南富民沈家村干堆尾礦庫的設(shè)計(jì)方案,在保證壩體穩(wěn)定性的同時提升了工程的經(jīng)濟(jì)性;同時其編制的命令流具有普遍適應(yīng)性,為類似干堆尾礦庫的相關(guān)研究提供了研究方法。
[Abstract]:At present, more and more attention has been paid to the safety and environmental protection of the tailings reservoir, and the dry pile tailings reservoir has been gradually adopted and popularized because of its advantages of no stagnant water at the tail of the tailings and high utilization ratio of the tailings. However, at present, the design standard of traditional wet tailing reservoir is used in the design of dry pile tailings reservoir in our country. The design code of dry pile tailings reservoir needs to be further improved, and the economic advantage of dry pile tailings reservoir can not be fully brought into play. With the extension and application of tailings dry pile technology in the rainy area of southern China, Rain Water infiltration on dam surface caused by rainfall occurs from time to time. The infiltration of rainfall will affect the stable operation of the dam body in dry pile tailings reservoir. It is necessary to increase the conditions under rainfall infiltration when analyzing the stability of dry pile tailings reservoir. In this paper, based on the engineering background of Qiandui tailings reservoir in Fumin Shenjiacun, Yunnan Province, the following studies have been carried out: (1) combined with the engineering examples and theoretical studies of the dry pile tailings reservoir, the factors affecting the stability of the dry pile tailings reservoir are analyzed by using fish-prickly diagram. It is considered that the main factors leading to the instability of dry pile tailing dam include the infiltration of Rain Water under rainfall condition, the selection of dam structure parameters and the influence of earthquake. (2) the 3D model of dry pile tailing reservoir is established by using ANSYS finite element software. The strength reduction method is used to solve the safety factor of the dam under normal working conditions. The displacement field and stress field distribution of the dam under convergent and non-convergent conditions are compared and calculated. It is considered that the tailings reservoir can operate stably under normal working conditions and has a large safety reserve. At the same time, compared with the calculation results of Swedish arc method, it is reasonable to calculate the safety factor by using ANSYS strength reduction method. (3) the stability of dam body under rainfall infiltration condition is studied. The coupling of seepage field and stress field is realized by using APDL parameterized language. The calculation results of dam body stability without considering two fields coupling and considering two fields coupling are compared and compared with the results under normal working conditions. It is considered that the two-field coupling calculation method should be used to analyze the dam body under the condition of rainfall infiltration when the stability analysis of dry pile tailings reservoir is carried out. (4) the structural optimization problem is studied theoretically, and the ANSYS optimization design module is introduced. The optimization model of dam structure of dry pile tailings reservoir is established. The optimization results of single design variable and integral objective function are obtained by optimization iteration, and the optimization scheme satisfying both safety and economy is determined. The relationship between the design variables and the state variables is obtained. (5) according to the optimization results, the dam body model is established, the stability of the dam body under normal working conditions and rainfall infiltration conditions is calculated, and the changes of displacement field and stress field of the dam body before and after optimization are compared. To verify the reliability of the optimization scheme. This paper not only studies the stability of the dam body under normal conditions and rainfall infiltration conditions, but also optimizes the design scheme of dry pile tailings reservoir in Fumin Shenjiacun, Yunnan Province. At the same time, the stability of the dam body is guaranteed and the economy of the project is improved, and the command flow compiled by the dam is of universal adaptability, which provides a research method for the research of the similar dry pile tailings reservoir.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD926.4
本文編號：2138696
[Abstract]:At present, more and more attention has been paid to the safety and environmental protection of the tailings reservoir, and the dry pile tailings reservoir has been gradually adopted and popularized because of its advantages of no stagnant water at the tail of the tailings and high utilization ratio of the tailings. However, at present, the design standard of traditional wet tailing reservoir is used in the design of dry pile tailings reservoir in our country. The design code of dry pile tailings reservoir needs to be further improved, and the economic advantage of dry pile tailings reservoir can not be fully brought into play. With the extension and application of tailings dry pile technology in the rainy area of southern China, Rain Water infiltration on dam surface caused by rainfall occurs from time to time. The infiltration of rainfall will affect the stable operation of the dam body in dry pile tailings reservoir. It is necessary to increase the conditions under rainfall infiltration when analyzing the stability of dry pile tailings reservoir. In this paper, based on the engineering background of Qiandui tailings reservoir in Fumin Shenjiacun, Yunnan Province, the following studies have been carried out: (1) combined with the engineering examples and theoretical studies of the dry pile tailings reservoir, the factors affecting the stability of the dry pile tailings reservoir are analyzed by using fish-prickly diagram. It is considered that the main factors leading to the instability of dry pile tailing dam include the infiltration of Rain Water under rainfall condition, the selection of dam structure parameters and the influence of earthquake. (2) the 3D model of dry pile tailing reservoir is established by using ANSYS finite element software. The strength reduction method is used to solve the safety factor of the dam under normal working conditions. The displacement field and stress field distribution of the dam under convergent and non-convergent conditions are compared and calculated. It is considered that the tailings reservoir can operate stably under normal working conditions and has a large safety reserve. At the same time, compared with the calculation results of Swedish arc method, it is reasonable to calculate the safety factor by using ANSYS strength reduction method. (3) the stability of dam body under rainfall infiltration condition is studied. The coupling of seepage field and stress field is realized by using APDL parameterized language. The calculation results of dam body stability without considering two fields coupling and considering two fields coupling are compared and compared with the results under normal working conditions. It is considered that the two-field coupling calculation method should be used to analyze the dam body under the condition of rainfall infiltration when the stability analysis of dry pile tailings reservoir is carried out. (4) the structural optimization problem is studied theoretically, and the ANSYS optimization design module is introduced. The optimization model of dam structure of dry pile tailings reservoir is established. The optimization results of single design variable and integral objective function are obtained by optimization iteration, and the optimization scheme satisfying both safety and economy is determined. The relationship between the design variables and the state variables is obtained. (5) according to the optimization results, the dam body model is established, the stability of the dam body under normal working conditions and rainfall infiltration conditions is calculated, and the changes of displacement field and stress field of the dam body before and after optimization are compared. To verify the reliability of the optimization scheme. This paper not only studies the stability of the dam body under normal conditions and rainfall infiltration conditions, but also optimizes the design scheme of dry pile tailings reservoir in Fumin Shenjiacun, Yunnan Province. At the same time, the stability of the dam body is guaranteed and the economy of the project is improved, and the command flow compiled by the dam is of universal adaptability, which provides a research method for the research of the similar dry pile tailings reservoir.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD926.4
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