發(fā)布時(shí)間：2018-05-21 17:19

  本文選題：煤矸石 + 界面摩擦試驗(yàn)��； 參考：《中南大學(xué)》2014年碩士論文

【摘要】：煤矸石是在煤礦建設(shè)、開(kāi)采、加工過(guò)程中產(chǎn)生的固體廢棄物,是一種在成煤過(guò)程中與煤層伴生的一種灰黑色巖石,是目前國(guó)內(nèi)存放量最大的固體廢棄物。煤矸石在礦區(qū)的大量堆積不僅會(huì)引起大氣、土壤等環(huán)境污染問(wèn)題,還會(huì)嚴(yán)重影響和危害人們的生活與健康,煤矸石的治理和綜合利用問(wèn)題己成為當(dāng)務(wù)之急。 本文結(jié)合課題“高速公路煤矸石路基填料工程應(yīng)用研究”(項(xiàng)目編號(hào)：2010-353-343-290),依托安邵高速公路煤矸石路堤填筑工程,通過(guò)對(duì)婁底地區(qū)煤矸石礦物和化學(xué)組成進(jìn)行分析,對(duì)不同摻土量煤矸石的物理力學(xué)性質(zhì)進(jìn)行研究,探究其作為高速公路路堤填料的可行性。主要研究?jī)?nèi)容和研究成果如下： 1)對(duì)不同摻土量煤矸石工程特性進(jìn)行試驗(yàn)研究,得出煤矸石基本物理參數(shù)隨摻土量之間的變化關(guān)系,并對(duì)煤矸石作路堤填料的可行性以及改善路用性能的方法進(jìn)行研究分析。 2)進(jìn)行不同摻土量加筋煤矸石的界面摩擦試驗(yàn),隨著剪切位移增加,剪應(yīng)力迅速增大,當(dāng)剪切位移達(dá)到一定值時(shí),曲線變得平緩,出現(xiàn)峰值強(qiáng)度和殘余強(qiáng)度。 3)采用雙曲線和指數(shù)模型擬合煤矸石剪應(yīng)力與剪切位移曲線,結(jié)果表明：兩個(gè)模型均不能體現(xiàn)煤矸石在剪切過(guò)程中的應(yīng)力軟化現(xiàn)象。本文提出了一個(gè)能夠反映煤矸石剪切過(guò)程中應(yīng)力應(yīng)變軟化的模型,并驗(yàn)證該模型擬合煤矸石界面摩擦試驗(yàn)的適用性。 4)格賓網(wǎng)加筋煤矸石的界面似摩擦系數(shù)采用殘余界面似摩擦系數(shù)比較合適,該系數(shù)一般通過(guò)試驗(yàn)獲得,在沒(méi)有試驗(yàn)數(shù)據(jù)的前提下,可采用公式F*=0.8·tanφv進(jìn)行計(jì)算。 5)對(duì)煤矸石加筋邊坡的設(shè)計(jì)方法進(jìn)行闡述,并提出加筋邊坡穩(wěn)定性驗(yàn)算公式；分析二級(jí)和三級(jí)邊坡平臺(tái)寬度及坡角對(duì)破裂面形式的影響,得出不同平臺(tái)寬度時(shí),二、三級(jí)邊坡的設(shè)計(jì)方法。
[Abstract]:Coal gangue is a kind of solid waste produced in the process of coal mine construction, mining and processing. It is a kind of gray and black rock associated with coal seam in the process of coal formation, and it is the largest amount of solid waste in China at present. The accumulation of coal gangue in mining area will not only cause environmental pollution such as atmosphere and soil, but also seriously affect and endanger people's life and health. The problem of coal gangue treatment and comprehensive utilization has become an urgent matter. In this paper, based on the project "Application study of coal gangue subgrade filling engineering" (project number 2010-2010-353-343-290), and relying on the coal gangue embankment filling project of An-Shao Expressway, the mineral and chemical composition of coal gangue in Loudi area is analyzed. The physical and mechanical properties of coal gangue with different soil content were studied and its feasibility as embankment filler was explored. The main research contents and results are as follows: 1) the engineering characteristics of coal gangue with different amount of coal gangue are tested and studied, and the relationship between the basic physical parameters of coal gangue and the amount of mixed soil is obtained, and the feasibility of coal gangue as embankment filler and the method to improve the road performance are studied and analyzed. 2) the interfacial friction test of coal gangue reinforced with different soil content shows that the shear stress increases rapidly with the increase of shear displacement. When the shear displacement reaches a certain value, the curve becomes smooth, and the peak strength and residual strength appear. 3) the curve of shear stress and shear displacement of coal gangue is fitted by hyperbolic and exponential model. The results show that the stress softening phenomenon of coal gangue in shear process can not be reflected by the two models. In this paper, a model which can reflect the stress and strain softening during the coal gangue shear process is proposed, and the applicability of the model to fit the friction test of coal gangue interface is verified. 4) the similar friction coefficient of the coal gangue reinforced by GB net is suitable for the residual interface similar friction coefficient, which is generally obtained by experiment. Without the test data, the formula FF0. 8 tan 蠁 v can be used to calculate the friction coefficient of the coal gangue. 5) the design method of reinforced slope of coal gangue is expounded, and the checking formula of stability of reinforced slope is put forward, and the influence of platform width and slope angle of secondary and third grade slope on the form of fracture surface is analyzed. The design method of the third grade slope.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U414;U416.12

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本文編號(hào)：1920078