【摘要】：論文以哈爾烏素露天煤礦端幫邊坡為研究對(duì)象,采用露天采礦學(xué)基本原理、邊坡穩(wěn)定性分析、數(shù)值模擬等技術(shù)手段,選取典型端幫剖面并結(jié)合巖體力學(xué)參數(shù),并采用數(shù)值模擬軟件對(duì)端幫邊坡進(jìn)行分析,確定了目前條件下哈礦的端幫邊坡穩(wěn)定性情況,并對(duì)端幫邊坡角度進(jìn)行優(yōu)化研究,對(duì)邊坡優(yōu)化后的開(kāi)拓運(yùn)輸系統(tǒng)進(jìn)行優(yōu)化。分析了露天煤礦端幫邊坡的構(gòu)成特征,從邊坡巖體力學(xué)角度分析了邊坡變形破壞的機(jī)理,結(jié)合哈爾露天煤礦的開(kāi)采參數(shù)及特征,分別采用有限元強(qiáng)度折減法和三種極限平衡法對(duì)選取的剖面進(jìn)行穩(wěn)定性分析,確定有限元法計(jì)算結(jié)果能較好的反映各剖面的穩(wěn)定性,南端幫SI-SI和SII-SII剖面穩(wěn)定系數(shù)分別為1.38和1.36,北端幫NI-NI和NII-NII剖面穩(wěn)定系數(shù)分別為1.14和1.20。采用單因素敏感性分析,確定了6#煤內(nèi)摩擦角、粗砂巖②內(nèi)摩擦角、粗砂巖①內(nèi)摩擦角、995平盤(pán)寬度和粗砂巖①重度為影響哈爾烏素露天礦端幫邊坡穩(wěn)定性的關(guān)鍵因素;選取了三種水平作為敏感性分析基礎(chǔ),建立4因素3水平正交試驗(yàn)?zāi)Ｐ?分別計(jì)算了各方案的穩(wěn)定性系數(shù),確定各因素的敏感性排序分別為6#煤內(nèi)摩擦角、粗砂巖②內(nèi)摩擦角、995平盤(pán)寬度和粗砂巖①的重度。通過(guò)對(duì)哈爾烏素露天煤礦南北兩端幫邊坡的優(yōu)化,以南幫順層邊坡和北幫逆層邊坡的最低穩(wěn)定系數(shù)分別為1.2和1.1,確定了南北端幫分別可以將端幫邊坡角提高至41°和39°,可分別增大32萬(wàn)t和34.5萬(wàn)t煤炭產(chǎn)出量;并分析確定了采場(chǎng)中部搭橋內(nèi)排運(yùn)輸通道作為哈爾烏素端幫邊坡優(yōu)化后的開(kāi)拓運(yùn)輸系統(tǒng)。
[Abstract]:This paper takes the end slope of Halwusu opencast coal mine as the research object, adopts the basic principle of open pit mining, slope stability analysis, numerical simulation and so on, selects the typical end side profile and combines the rock mass mechanics parameter. By using numerical simulation software to analyze the end slope, the stability of the end slope in Harbin Mine is determined, and the angle of the end side slope is optimized to optimize the development and transportation system of the slope. This paper analyzes the composing characteristics of the end slope in open pit coal mine, analyzes the mechanism of slope deformation and failure from the angle of slope rock mechanics, and combines with the mining parameters and characteristics of Hal opencast coal mine. The finite element strength reduction method and three limit equilibrium methods are used to analyze the stability of selected sections, and it is determined that the results of finite element method can better reflect the stability of each section. The stability coefficients of SI-SI and SII-SII profiles are 1.38 and 1.36 in the southern end and 1.14 and 1.20 in the northern end respectively. Based on the single factor sensitivity analysis, the internal friction angle of 6 # coal, the 2 internal friction angle of coarse sandstone, the width of 995 flat plate of coarse sandstone 1 and the weight of coarse sandstone 1 are determined to be the key factors affecting the slope stability of the end slope of Halwusu opencast mine. Three levels are selected as the basis of sensitivity analysis, and the orthogonal test model of 4 factors and 3 levels is established. The stability coefficients of each scheme are calculated, and the sensitivity ranking of each factor is determined to be the internal friction angle of 6 # coal, respectively. The width of 995 flat disk of coarse sandstone 2 and the severity of coarse sandstone 1. By optimizing the slope between the north and the south of Halwusu opencast coal mine, The lowest stability coefficients of the south side slope and the north side slope are 1.2 and 1.1 respectively. It is determined that the north and south end slope can increase the slope angle to 41 擄and 39 擄respectively, and the coal output of 320000 t and 345000 t can be increased respectively. The internal transport passage of the bypass bridge in the middle of the stope is analyzed and determined as the development and transportation system after the optimization of the end slope of Halwusu.
【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TD824.7

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 高富強(qiáng);王莫舒;;哈爾烏素露天礦邊坡穩(wěn)定性數(shù)值模擬分析[J];露天采礦技術(shù);2013年07期

2 宋成順;于大鵬;王來(lái)貴;;伊敏露天礦西端幫邊坡穩(wěn)定性分析[J];露天采礦技術(shù);2013年09期

3 彭德紅;淺談邊坡穩(wěn)定性分析方法[J];上海地質(zhì);2005年03期

4 陳久利;王寧;袁永才;;露天礦排土場(chǎng)邊坡穩(wěn)定性分析[J];青島理工大學(xué)學(xué)報(bào);2012年05期

5 陳新民,羅國(guó)煜;基于經(jīng)驗(yàn)的邊坡穩(wěn)定性灰色系統(tǒng)分析與評(píng)價(jià)[J];巖土工程學(xué)報(bào);1999年05期

6 才慶祥;周偉;舒繼森;劉勇;彭洪閣;;大型近水平露天煤礦端幫邊坡時(shí)效性分析及應(yīng)用[J];中國(guó)礦業(yè)大學(xué)學(xué)報(bào);2008年06期

7 王永勝;郭靜蕓;董高峰;李守定;赫建明;;遼寧撫順西露天礦北幫邊坡穩(wěn)定性分析及變形分區(qū)[J];中國(guó)地質(zhì)災(zāi)害與防治學(xué)報(bào);2012年04期

，

本文編號(hào)：2199156