【摘要】：自然界中具有層狀構(gòu)造的沉積巖占陸地總面積的2/3,許多變質(zhì)巖也具有層狀構(gòu)造特征,因此,在工程建設(shè)中,層狀巖質(zhì)邊坡將會(huì)是遇到最多的一類(lèi)邊坡。本文應(yīng)用相似模型試驗(yàn)方法研究層狀巖質(zhì)邊坡失穩(wěn)破壞模式及其變形機(jī)理,首先是根據(jù)相似原理,結(jié)合所研究的工程對(duì)象及室內(nèi)實(shí)驗(yàn)室條件,確定模型試驗(yàn)的幾何相似常數(shù),對(duì)試驗(yàn)?zāi)Ｐ瓦M(jìn)行加工；其次選擇模型在重度、抗壓強(qiáng)度、彈模、泊松比上與原型的相似性,進(jìn)行相似模型材料配比試驗(yàn)的研究；再次選取人工分層填筑夯實(shí)的方法進(jìn)行模型的填筑,養(yǎng)護(hù)好后布置觀測(cè)點(diǎn),以一面坡的形式對(duì)模型進(jìn)行開(kāi)挖,每次開(kāi)挖后測(cè)量觀測(cè)點(diǎn)的變形。 物理模擬研究方法應(yīng)用于層狀巖質(zhì)邊坡的穩(wěn)定性分析具有直觀性強(qiáng),可定性或定量的分析與全場(chǎng)逐點(diǎn)給出結(jié)論的優(yōu)點(diǎn)。本文以云南磷化集團(tuán)尖山磷礦東采區(qū)采場(chǎng)邊坡為研究對(duì)象,通過(guò)相似材料的配比,確定了用河砂和石膏作為模擬巖石的相似材料,云母粉作為模擬層面的相似材料。通過(guò)5組模型試驗(yàn),分別研究了邊坡開(kāi)挖深度、巖層傾角、巖層層厚對(duì)邊坡穩(wěn)定性的影響。通過(guò)對(duì)試驗(yàn)現(xiàn)象和數(shù)據(jù)的分析,發(fā)現(xiàn)順層巖質(zhì)邊坡破壞面呈“折線(xiàn)形”,順層巖質(zhì)邊坡模型出現(xiàn)典型的上部下陷,下部“鼓脹”變形的特征；順層巖質(zhì)邊坡主要存在拉裂破壞和滑移—壓裂破壞兩類(lèi)破壞模式,30°和35°傾角邊坡表現(xiàn)為拉裂破壞,45°和50°傾角邊坡表現(xiàn)為滑移—壓裂破壞；從變形量來(lái)看,上部和下部變形量大,中部變形量小,接近開(kāi)挖面的層面變形量大,深部巖層變形量小。 通過(guò)計(jì)算和分析獲得了露天礦開(kāi)采時(shí)邊坡變形運(yùn)動(dòng)規(guī)律,結(jié)合相似理論可以將模型的結(jié)果換算到原型中,為礦山生產(chǎn)實(shí)踐提供有效指導(dǎo)作用。
[Abstract]:In nature, sedimentary rocks with layered structure account for 2 / 3 of the total land area, and many metamorphic rocks also have stratiform structural characteristics. Therefore, in engineering construction, layered rock slope will be the most encountered type of slope. In this paper, the failure mode and deformation mechanism of layered rock slope are studied by using similarity model test method. Firstly, according to the similarity principle, the geometric similarity constant of the model test is determined according to the engineering object and laboratory conditions studied. Machining the test model; Secondly, the similarity between the model and the prototype on the degree of weight, compressive strength, elastic modulus and Poisson's ratio is selected, and the material matching test of the similar model is carried out. The method of artificial stratified tamping is chosen to fill the model again, and the observation points are arranged after maintenance, and the model is excavated in the form of one slope, and the deformation of the observation point is measured after each excavation. The application of physical simulation method to the stability analysis of layered rock slope has the advantages of being intuitive, qualitative or quantitative analysis and point by point conclusion. Taking the stope slope of the eastern mining area of Jianshan Phosphate Mine of Yunnan Phosphate Group as the research object, the similar materials of river sand and gypsum are determined through the proportion of similar materials, and the mica powder is used as the similar material in the simulation plane. Through five groups of model tests, the effects of slope excavation depth, rock dip angle and stratum thickness on slope stability were studied respectively. Through the analysis of the experimental phenomena and data, it is found that the failure surface of the bedding rock slope is "folded", and the typical upper subsidence and "bulging" deformation are found in the model of the bedding rock slope. There are two kinds of failure modes: tensile fracture and sliding fracturing failure in bedding rock slope, 30 擄and 35 擄inclined slope are tensile fracture, 45 擄and 50 擄slope are sliding fracturing failure. From the point of view of deformation, the upper and lower deformation is large, the middle deformation is small, the surface deformation near the excavating surface is large, and the deep rock deformation is small. The law of slope deformation and movement in open-pit mining is obtained by calculation and analysis. The results of the model can be converted to the prototype in combination with similarity theory, which can provide effective guidance for mine production practice.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TU45

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉合寨;孫世國(guó);闞生雷;馮松寶;;模糊綜合評(píng)判在高陡邊坡穩(wěn)定性評(píng)價(jià)中的應(yīng)用[J];北方工業(yè)大學(xué)學(xué)報(bào);2010年03期

2 劉云鵬;黃潤(rùn)秋;鄧輝;;反傾板裂巖體邊坡振動(dòng)物理模擬試驗(yàn)研究[J];成都理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年04期

3 呂美君;晏鄂川;;順層邊坡巖體結(jié)構(gòu)穩(wěn)定性分析[J];地球與環(huán)境;2005年S1期

4 孫玉科;李建國(guó);;巖質(zhì)邊坡穩(wěn)定性的工程地質(zhì)研究[J];地質(zhì)科學(xué);1965年04期

5 閆文佳;閻宗嶺;賈學(xué)明;;樁基荷載下溶洞頂板承載特性物理模擬研究[J];公路交通技術(shù);2012年03期

6 唐承平,陳宇亮,王惠勇,伍曉東,芮勇勤;不對(duì)稱(chēng)開(kāi)挖巖質(zhì)高陡路塹邊坡的相似模擬研究[J];中外公路;2004年03期

7 陳革強(qiáng);剛體極限平衡法淺析[J];海河水利;1999年02期

8 盧世宗;我國(guó)礦山邊坡研究的基本情況和展望[J];金屬礦山;1999年09期

9 孔令強(qiáng);孫景民;;模擬煤體的相似材料配比試驗(yàn)研究[J];露天采礦技術(shù);2007年04期

10 李常文;唐烈先;唐春安;邢軍;楊國(guó)強(qiáng);;南芬露天礦邊坡失穩(wěn)數(shù)值模擬[J];煤炭工程;2006年07期

相關(guān)博士學(xué)位論文 前1條

1 肖林萍;連拱隧道圍巖變形規(guī)律研究[D];西南交通大學(xué);2009年

，

本文編號(hào)：2413626