本文選題：礦山邊坡 + 反錯變形　； 參考：《長安大學(xué)》2015年碩士論文

【摘要】：露天礦開采是我國金屬礦山開采的主要形式之一,在露天礦的開采過程中會形成多級臺階狀的邊坡。這些已經(jīng)成型的臺階狀邊坡在應(yīng)力重分布、卸荷回彈和地下水的作用下易發(fā)生多種類型的變形破壞。常見的邊坡破壞類型有平面破壞、楔體破壞、弧形破壞和傾倒破壞,而本文所討論的反錯變形是一種新的邊坡破壞類型,它是根據(jù)金堆城鉬礦礦區(qū)北幫邊坡的實際變形情況提出來的。2014年中旬,金堆城礦區(qū)1號與4號公路之間的北幫通行、觀光道路1250平臺出現(xiàn)多條臨空面?zhèn)雀哂谶吰聝?nèi)側(cè)的臺階狀錯動,給礦區(qū)安全生產(chǎn)帶來嚴(yán)重威脅。文本的研究分兩部分:第一部分為了探究邊坡反錯變形的形成原因,提出“轉(zhuǎn)動滑坡”、“結(jié)構(gòu)面控制”、“空洞的影響”及“差異沉降”這四種構(gòu)想,然后利用有限元軟件geo-studio對這四種構(gòu)想進(jìn)行驗證性模擬;第二部分根據(jù)金堆城北幫邊坡的工程地質(zhì)條件,運(yùn)用geo-studio軟件選取兩個剖面進(jìn)行模擬分析,并討論案例邊坡發(fā)生反錯變形的主要原因�；谝陨嫌懻摰贸霰疚闹饕Y(jié)論:(1)邊坡反錯變形是通過對案例邊坡—金堆城露天鉬礦北幫邊坡的研究而提出來的,露天礦邊坡開挖后形成的多級臺階平臺為反錯變形提供了幾何條件。(2)金堆城北幫邊坡出現(xiàn)反錯變形地段的物質(zhì)組成為斷裂帶內(nèi)的張性角礫巖,其特有的物理力學(xué)特征為其變形趨勢創(chuàng)造了物質(zhì)條件。(3)根據(jù)模擬成果得出泊松比ν,內(nèi)摩擦角υ,粘聚力C均對邊坡平臺的變形趨勢有影響,但其影響程度不足以使邊坡發(fā)生反錯變形。(4)基于四種反錯變形成因構(gòu)想,分別使用軟件對其進(jìn)行仿真模擬,研究表明在某些參數(shù)組合下四種構(gòu)想在均能使模型邊坡在中間平臺處發(fā)生明顯的反錯變形。(5)研究區(qū)邊坡處于燕門凹斷裂帶上,已經(jīng)查明有兩條較大斷層通過,并且發(fā)育多條小規(guī)模的次級斷層,斷層面傾角較大。研究區(qū)邊坡發(fā)生反錯變形主要受巖性差異及其內(nèi)部高傾角結(jié)構(gòu)面的影響。
[Abstract]:Open-pit mining is one of the main forms of metal mining in China. Many types of deformation and failure are likely to occur under the stress redistribution, unloading rebound and groundwater action of these formed stepped slopes. The common types of slope failure include plane failure, wedge failure, arc failure and toppling failure. The reverse fault deformation discussed in this paper is a new type of slope failure. It was proposed on the basis of the actual deformation of the northern slope in Jinduicheng molybdenum mine area. In mid-2014, the north side of Jinduicheng mining area between Highway 1 and Road 4 passed through. On the 1250 platform of the sightseeing road, there are many stair staggered surfaces above the inner side of the slope, which pose a serious threat to the safety of production in the mining area. The research of the text is divided into two parts: the first part, in order to probe into the forming reason of the reverse fault deformation of the slope, put forward the four ideas of "rotational landslide", "structural plane control", "the influence of cavity" and "differential settlement". Then using finite element software geo-studio to verify the four ideas. The second part according to the engineering geological conditions of the north slope of Jinduicheng, using geo-studio software to select two sections for simulation analysis. The main causes of the reverse fault deformation of the slope are discussed. Based on the above discussion, the main conclusions of this paper are as follows: (1) the anti-fault deformation of the slope is put forward through the study of the north slope of Jinduicheng opencast molybdenum mine. The multi-step platform formed after the excavation of open-pit slope provides geometric conditions for anti-fault deformation. (2) the material composition of the slope in the north slope of Jinduicheng is tensional breccia in the fault zone. Its unique physical and mechanical characteristics create material conditions for the deformation trend. (3) according to the simulation results, Poisson's ratio, internal friction angle, cohesion C have influence on the deformation trend of slope platform. But its influence degree is not enough to make the slope reverse fault deformation. (4) based on four kinds of anti-fault deformation cause conception, the software is used to simulate the slope. The results show that the four ideas under some parameter combinations can cause obvious anti-fault deformation of the model slope in the middle platform. (5) the slope in the study area is located on the Yanmen concave fault zone, and two large faults have been found to pass through. And many minor secondary faults are developed, and the dip of fault plane is larger. The reverse fault deformation of the slope in the study area is mainly affected by the difference of lithology and the internal high dip structural plane.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD854.6

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