本文選題：高寒地區(qū) + 露天邊坡�。� 參考：《長沙礦山研究院》2016年碩士論文

【摘要】：隨著礦業(yè)經(jīng)濟(jì)的增長,我國在高寒地區(qū)的礦山工程建設(shè)得到了很大的發(fā)展。礦山的建設(shè)規(guī)模及復(fù)雜性的增大帶來了復(fù)雜的工程地質(zhì)及巖土工程問題。溫度變化對(duì)長年凍土地區(qū)高含水量邊坡的穩(wěn)定性具有顯著的影響。認(rèn)識(shí)高寒地區(qū)凍融災(zāi)害對(duì)邊坡穩(wěn)定性的影響,以便在工程設(shè)計(jì)和開采過程中降低這種災(zāi)害的影響,是高寒地區(qū)礦產(chǎn)資源合理開發(fā)的重要研究內(nèi)容。蒙古國敖包鋅礦是一座位于高寒地區(qū)的露天礦山。由于受不良的邊坡工程地質(zhì)條件、邊坡結(jié)構(gòu)參數(shù)不合理以及凍融和爆破震動(dòng)影響,臺(tái)階邊坡發(fā)生垮塌,局部地段邊坡發(fā)生滑坡,嚴(yán)重影響了礦山的生產(chǎn)安全和經(jīng)濟(jì)效益。為了消除礦山的生產(chǎn)安全隱患,確保礦山的生產(chǎn)安全。結(jié)合敖包鋅礦的實(shí)際情況,通過現(xiàn)場(chǎng)調(diào)查、實(shí)驗(yàn)室試驗(yàn)、理論分析和數(shù)值模擬相結(jié)合的方法,開展了高寒地區(qū)邊坡穩(wěn)定性分析和結(jié)構(gòu)參數(shù)優(yōu)化研究,主要研究內(nèi)容和成果如下:(1)采用SIROVISION三維數(shù)字?jǐn)z影測(cè)量和巖體結(jié)構(gòu)分析系統(tǒng)等手段開展了礦山工程地質(zhì)調(diào)查,對(duì)組成邊坡的矽卡巖、大理巖和花崗巖等六種巖性進(jìn)行了室內(nèi)巖石力學(xué)實(shí)驗(yàn),運(yùn)用RMR、CSMR等分級(jí)方法對(duì)邊坡工程巖體進(jìn)行質(zhì)量評(píng)價(jià)。在此基礎(chǔ)上,對(duì)露天邊坡進(jìn)行工程地質(zhì)分區(qū),分析了各邊坡區(qū)段的破壞模式。(2)建立了凍融環(huán)境多場(chǎng)耦合條件下露天邊坡穩(wěn)定性計(jì)算模型,分析了邊坡在環(huán)境溫度分別為-10℃、-20℃、-30℃時(shí)巖體內(nèi)部溫度梯度變化特征,確定凍融邊界線位置。研究了露天邊坡在重力場(chǎng)、溫度場(chǎng)及其耦合情況下,不同環(huán)境溫度時(shí)的應(yīng)力及凍脹變化規(guī)律。(3)采用RMR巖體分類法、HOEK-BROWN破壞準(zhǔn)則、格吉法以及反算法獲取力學(xué)參數(shù)。綜合考慮邊坡的巖體組成、工程地質(zhì)條件以及邊坡高度及形狀等因素,利用邊坡巖體室內(nèi)試驗(yàn)和現(xiàn)場(chǎng)試驗(yàn)成果,采用極限平衡法和有限元強(qiáng)度折減法對(duì)不同工況下礦山設(shè)計(jì)邊坡的穩(wěn)定性進(jìn)行分析。(4)在邊坡穩(wěn)定性分析和對(duì)凍融環(huán)境影響規(guī)律研究的基礎(chǔ)上,對(duì)礦山設(shè)計(jì)邊坡的參數(shù)優(yōu)化方案進(jìn)行對(duì)比分析。綜合分析考慮了整體邊坡穩(wěn)定性、凍融環(huán)境引起的臺(tái)階邊坡滾石災(zāi)害防護(hù)要求,確定了安全可靠、經(jīng)濟(jì)合理的邊坡參數(shù)優(yōu)化方案。
[Abstract]:With the growth of mining economy, the mine engineering construction in the alpine area has been greatly developed. The increase of the scale and complexity of mine construction brings complex engineering geology and geotechnical engineering problems. The change of temperature has a significant effect on the stability of the slope with high water content in the long frozen soil area. Understanding the influence of freezing and thawing disaster on slope stability in high cold area in order to reduce the influence of this disaster in the course of engineering design and mining is an important research content of rational exploitation of mineral resources in alpine region. Mongol Aobo zinc mine is an open-pit mine located in high and cold regions. Due to poor engineering geological conditions, unreasonable slope structural parameters, freezing and thawing and blasting vibration, the step slope collapses and the local slope landslide, which seriously affects the safety of production and economic benefits of the mine. In order to eliminate the hidden trouble of mine production safety and ensure the safety of mine production. Combined with the actual situation of Aobo zinc mine, the stability analysis and structural parameter optimization of slope in high and cold region were carried out by the methods of field investigation, laboratory test, theoretical analysis and numerical simulation. The main research contents and results are as follows: (1) the mine engineering geological survey was carried out by means of SIROVISION 3D digital photogrammetry and rock mass structure analysis system. Six kinds of rock properties, such as marble and granite, were tested in laboratory, and the quality of slope engineering rock mass was evaluated by RMR-CSMR classification method. On this basis, the engineering geological zoning of open-pit slope is carried out, and the failure modes of each slope section are analyzed. (2) the calculation model of slope stability in freeze-thaw environment under multi-field coupling condition is established. The variation characteristics of internal temperature gradient of rock mass at ambient temperature of -10 鈩，

本文編號(hào)：2068449