煤层自燃对边坡稳定性影响的研究毕业论文（含外文翻译）.docVIP

中文题目：煤层自燃对边坡稳定性影响的研究 外文题目：Coal Spontaneous Combustion impact on slope stability studies 毕业设计（论文）共 94页 （其中外文翻译32页） 完成日期 2013年6月 答辩日期 2013年6月 摘要煤自燃现象已经在自然界存在了数百万年。我国北方露天着火面积达7200km2，累计烧毁煤量42亿t以上，并以每年2000～3000万t的速度增加，受其影响造成的呆滞资源储量每年超过2亿，直接经济损失每年高达数十亿人民币。而海州露天矿每年煤自燃次数相当的多，严重威胁着人民的生命财产安全，阻碍了煤炭工业的可持续发展，并由此造成巨大的间接损失。因此，有必要对海州露天矿开展煤自燃对边坡稳定性的分析研究。 为了解决边坡在燃烧后稳定性遇到的挑战, 采用理论分析和数值模拟分析对露天矿的边坡稳定性进行研究。首先研究温度对岩石力学性质的影响机理。岩石矿物颗粒受到温度的影响而热胀冷缩，导致矿物颗粒间接触发生了变化，进而使得其强度发生变化。岩石的强度、弹性模量与温度变化均呈线性相关关系。其次，借助计算软件ANSYS求解岩体中煤层在燃烧前后对边坡稳定性的影响。利用ANSYS模拟边坡在只有重力作用下的分析研究，得到边坡的应力、变形云图。然后再在煤层自燃的条件下进行模拟研究，得到边坡的温度云图、变形、应力云图。最后，对两种情况下边坡的位移情况相比较，得到煤层自燃是造成海州露天矿南边边坡发生滑坡的主要原因。 关键词: 煤层自燃; 高温；ANSYS；稳定性；热应力 Abstract Coal spontaneous combustion phenomenon has existed for millions of years in nature. Outdoor fire area of 7200 km2 in the north of China, the cumulative burned coal 4.2 billion tons, and increased at an annual rate of 2000 ~ 30 million t, subject to the influence caused by the sluggish reserves of more than 200 million a year, a direct economic loss of billions of yuan a year. The Haizhou open-pit coal mine every year the number of coal spontaneous combustion rather more, seriously threatens peoples life and property safety, hindered the sustainable development of coal industry, and thus cause huge indirect losses. Therefore, it is necessary to Haizhou open-pit coal mine coal spontaneous combustion on the analysis of slope stability study. In order to solve the side slope stability after burning, Theoretical analysis and numerical simulation analysis for open pit slope stability studies .Firstly, contact situation and intensity of mineral particles change because of thermal expansion and cold contraction. The relation between intensity and elastic modulus of rocks and temperature change is linear correlation . Secondly, analyze the side slope stability of the coal before and after burning is analyzed with ANSYS. Only use ANSYS simulation slope under gravity in analysis and research to get the slope