本文選題：細(xì)粒尾礦 + 力學(xué)性質(zhì)　； 參考：《西安理工大學(xué)》2017年碩士論文

【摘要】：隨著我國(guó)科學(xué)技術(shù)的發(fā)展及機(jī)械制造業(yè)技術(shù)的不斷提高,礦山企業(yè)的選礦技術(shù)也有了突飛猛進(jìn)的發(fā)展,選礦過(guò)后的尾礦廢渣顆粒也呈現(xiàn)逐漸變細(xì)的趨勢(shì),而細(xì)粒尾礦透水性差,固結(jié)速度較慢等特點(diǎn)使得上游式細(xì)粒料尾礦壩穩(wěn)定性及抗震能力相對(duì)較弱,潰壩可能性增大。因此,針對(duì)細(xì)粒尾礦展開的物理力學(xué)試驗(yàn)研究是很有必要的。本文以陜西某金礦細(xì)粒尾礦料為研究對(duì)象,通過(guò)一系列室內(nèi)試驗(yàn)對(duì)細(xì)粒尾礦料力學(xué)特性進(jìn)行研究,并在此基礎(chǔ)上進(jìn)行尾礦壩的靜力、動(dòng)力響應(yīng)分析。具體內(nèi)容如下:首先,對(duì)三種不同顆粒組成的細(xì)粒尾礦進(jìn)行壓縮試驗(yàn)、滲透試驗(yàn)、靜三軸試驗(yàn)、動(dòng)三軸試驗(yàn),得到了尾礦料的物理力學(xué)特性指標(biāo),并整理得到各顆粒組成及干密度下的鄧肯-張模型參數(shù)及等效粘彈性模型參數(shù),為仿真計(jì)算提供必要條件。同時(shí)對(duì)所獲取參數(shù)進(jìn)行對(duì)比分析,確定隨著細(xì)粒尾礦中顆粒成分的變化對(duì)其力學(xué)特性的影響。其次,針對(duì)實(shí)際工程中上游式尾礦壩尾礦上部排放與下部固結(jié)同時(shí)進(jìn)行的特點(diǎn),為確定尾礦在沉積過(guò)程中某一固結(jié)狀態(tài)下的力學(xué)特性,試驗(yàn)研究細(xì)粒尾礦在不同固結(jié)度、不同干密度下的力學(xué)特性,并對(duì)比分析由于顆粒成分不同而引起的特性差異。最后,利用試驗(yàn)所得參數(shù),利用EFES3D程序進(jìn)行尾礦壩的靜動(dòng)力有限元分析,了解細(xì)粒尾礦在分級(jí)填筑過(guò)后及地震動(dòng)作用下尾礦壩內(nèi)應(yīng)力、變形及穩(wěn)定性情況。
[Abstract]:With the development of science and technology in China and the continuous improvement of machinery manufacturing technology, the mineral processing technology of mining enterprises has also developed by leaps and bounds, and the tailings after dressing have shown a trend of gradually thinning, and the permeability of fine tailings is poor. The stability and seismic capacity of upstream fine-grained tailings dam are relatively weak and the possibility of dam break is increased due to the slow consolidation speed. Therefore, it is necessary to study the physical mechanics of fine tailings. In this paper, the mechanical properties of fine tailings are studied through a series of laboratory tests, and the static and dynamic responses of the tailings dam are analyzed on the basis of a series of laboratory tests. The main contents are as follows: firstly, the physical and mechanical properties of the tailings are obtained by compression test, permeation test, static triaxial test and dynamic triaxial test. The Duncan-Chang model parameters and the equivalent viscoelastic model parameters are obtained under the dry density and particle composition, which provides the necessary conditions for the simulation calculation. At the same time, the parameters obtained are compared and analyzed to determine the effect of the change of particle composition on the mechanical properties of fine tailings. Secondly, in view of the characteristics of upper tailings discharge and lower consolidation of upstream tailings dam in practical engineering, in order to determine the mechanical characteristics of tailings in a certain consolidation state during the sedimentation process, the different consolidation degree of fine tailings is studied experimentally. The mechanical properties of different dry densities were compared and analyzed. Finally, the static and dynamic finite element analysis of the tailings dam is carried out by using the EFES3D program, and the stress, deformation and stability of the tailings dam after the fine tailing is graded and filled and under the action of ground motion are obtained.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TV41;TV52

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本文編號(hào)：1828635