【摘要】：本文首先分析了巖質(zhì)邊坡穩(wěn)定性的影響因素,并總結(jié)了軟弱夾層的基本特征,闡述了含軟弱夾層邊坡主要破壞形式以及軟弱夾層對(duì)邊坡的作用機(jī)理。在此基礎(chǔ)上,將突變理論、災(zāi)變鏈?zhǔn)嚼碚摗⒄辉囼?yàn)以及數(shù)值模擬等方法運(yùn)用到含軟弱夾層巖質(zhì)邊坡的研究中。1、針對(duì)含軟弱夾層巖質(zhì)邊坡穩(wěn)定性問題,考慮軟弱夾層的應(yīng)變?nèi)趸退氯趸?yīng),建立了含單層軟弱夾層的燕尾型突變模型,根據(jù)邊坡勢函數(shù)形式的變化來研究邊坡在滑坡演化過程中的突跳特性。2、應(yīng)用災(zāi)害鏈理論,構(gòu)建了含軟弱夾層巖質(zhì)邊坡的災(zāi)害鏈,運(yùn)用“孕源斷鏈減災(zāi)”的理念,探討了含軟弱夾層巖質(zhì)邊坡防災(zāi)減災(zāi)的途徑與對(duì)策。3、將正交試驗(yàn)和數(shù)值模擬相結(jié)合,選取夾層厚度、夾層傾角、夾層粘聚力、夾層內(nèi)摩擦角以及夾層在邊坡坡面出露處距離坡腳距離等5個(gè)因素,通過對(duì)正交設(shè)計(jì)得出的16個(gè)含軟弱夾層邊坡模型進(jìn)行計(jì)算分析,得出每個(gè)邊坡模型在X方向的最大位移值以及安全系數(shù)。最后對(duì)結(jié)果進(jìn)行多因素方差分析及相關(guān)性分析,得出對(duì)邊坡穩(wěn)定性影響的主導(dǎo)因素以及相關(guān)性因素。結(jié)果表明：夾層厚度、夾層傾角以及夾層內(nèi)摩擦角是邊坡穩(wěn)定性顯著性的影響因素；軟弱夾層傾角、內(nèi)摩擦角以及厚度與邊坡穩(wěn)定性存在顯著的相關(guān)關(guān)系,軟弱夾層傾角越大,內(nèi)摩擦角越小,厚度越大,邊坡越容易發(fā)生失穩(wěn)破壞。4、對(duì)軟弱夾層在邊坡坡面上出露與不出露兩種情況分別進(jìn)行數(shù)值分析,并與邊坡不含軟弱夾層情況進(jìn)行了對(duì)比,得出幾種情況下邊坡變形破壞機(jī)制的不同：夾層出露時(shí),隨著出露位置靠近坡頂,變形破壞機(jī)制為滑移-拉裂→崩塌破壞；夾層不出露時(shí),當(dāng)邊坡巖體巖性較好時(shí),邊坡不容易沿著夾層形成貫通的塑性變形區(qū),邊坡相對(duì)穩(wěn)定。但當(dāng)邊坡巖體巖性較差時(shí),邊坡巖體將可能發(fā)生潰曲破壞；邊坡不含軟弱夾層時(shí),邊坡整體剪應(yīng)變增量均勻且數(shù)值較小,邊坡較為穩(wěn)定。5、結(jié)合某露天礦含軟弱夾層巖質(zhì)邊坡,對(duì)其穩(wěn)定性進(jìn)行研究,并提出開采過程中邊坡防災(zāi)減災(zāi)的途徑和措施。
[Abstract]:In this paper, the factors influencing the stability of rock slope are analyzed, and the basic characteristics of weak intercalation are summarized. The main failure forms of the slope with weak intercalation and the action mechanism of weak intercalation on the slope are expounded. On this basis, catastrophe theory, catastrophe chain theory, orthogonal test and numerical simulation are applied to the study of rock slope with weak intercalation. Considering the strain weakening and water induced weakening effect of weak intercalation, a swallowtail catastrophe model with single layer weak intercalation is established. According to the change of slope potential function form, the sudden jump characteristics of slope in the process of landslide evolution are studied, and the disaster chain theory is applied. In this paper, the disaster chain of rock slope with weak intercalation is constructed, and the method and countermeasure of disaster prevention and mitigation of rock slope with weak intercalation are discussed by using the idea of "pregnant source broken chain disaster reduction". The thickness of intercalation is selected by combining orthogonal test and numerical simulation. Five factors, such as intercalation angle, interlayer cohesion, interlayer internal friction angle and distance from the foot of the slope where the interlayer is exposed on the slope surface, are calculated and analyzed through the calculation and analysis of 16 slope models with weak intercalation, which are obtained by orthogonal design. The maximum displacement value and safety factor of each slope model in X direction are obtained. Finally, the multivariate variance analysis and correlation analysis are carried out, and the main factors and correlation factors that affect the slope stability are obtained. The results show that interlayer thickness, interlayer inclination angle and interlayer internal friction angle are the influential factors of slope stability, and weak interlayer inclination angle, internal friction angle and thickness have significant correlation with slope stability. The smaller the angle of internal friction, the greater the thickness, the more prone to failure of the slope. 4. The numerical analysis of the weak intercalation on the slope surface is carried out, and the comparison is made with the case of the slope without the weak intercalation. It is concluded that the deformation and failure mechanism of the slope is different in several cases: when the intercalation is exposed, the mechanism of deformation and failure is slip-tension crack collapse when the exposed position is near the top of the slope, and when the intercalation is not exposed, when the rock mass property of the slope is better, The slope is not easy to form the plastic deformation zone along the interlayer, and the slope is relatively stable. However, when the rock mass of the slope is poor, the rock mass of the slope may crumble and destroy. When the slope does not contain the weak intercalation, the increment of the whole shear strain of the slope is uniform and the value is small, the slope is relatively stable, and the rock slope with weak intercalation in a certain opencast mine is more stable. The stability of the slope is studied, and the ways and measures of slope disaster prevention and mitigation in mining process are put forward.
【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】：2015
【分類號(hào)】：TU457

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 姜永東;鮮學(xué)福;郭臣業(yè);;層狀巖質(zhì)邊坡失穩(wěn)的燕尾突變模型[J];重慶大學(xué)學(xué)報(bào);2008年05期

2 姚愛軍,易武,王尚慶;楊家?guī)X1~#滑坡穩(wěn)定性影響因素及敏感性分析[J];工程地質(zhì)學(xué)報(bào);2004年04期

3 劉晶輝,王山長,楊洪海;軟弱夾層流變試驗(yàn)長期強(qiáng)度確定方法[J];勘察科學(xué)技術(shù);1996年05期

4 左宇軍,李夕兵,趙國彥;受靜載荷作用的巖石動(dòng)態(tài)斷裂的突變模型[J];煤炭學(xué)報(bào);2004年06期

5 莫曉華;趙雙祥;;基于正交設(shè)計(jì)的軟弱夾層巖質(zhì)邊坡影響因素分析[J];北方交通;2014年10期

6 陳高峰;程圣國;盧應(yīng)發(fā);陳燈紅;;基于均勻設(shè)計(jì)的邊坡穩(wěn)定性敏感性分析[J];水利學(xué)報(bào);2007年11期

7 黃宏偉;車平;;泥巖遇水軟化微觀機(jī)理研究[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2007年07期

相關(guān)博士學(xué)位論文 前1條

1 李桂臣;軟弱夾層頂板巷道圍巖穩(wěn)定與安全控制研究[D];中國礦業(yè)大學(xué);2008年

相關(guān)碩士學(xué)位論文 前5條

1 王志勇;含軟弱夾層巖質(zhì)邊坡穩(wěn)定性分析研究[D];中南大學(xué);2004年

2 王沙q，

本文編號(hào)：2231381