【作者】 王磊；

【导师】 王渭明；

【作者基本信息】 山东科技大学 ， 岩土工程， 2010， 硕士

【摘要】 弱胶结地层冻结凿井冻结壁的变形研究与冻结壁安全控制是继深厚表土冻结凿井安全控制难题后出现的另一冻结研究课题,本文结合内蒙古上海庙矿业公司新上海一号煤矿冻结凿井安全监测课题,参阅国内外相关研究文献,以理论分析与数值模拟分析相结合的方法研究弱胶结地层冻结凿井冻结壁变形的影响因素及其敏感性,为该地区具有类似地层冻结凿井工程冻结设计、施工安全控制提供依据。本文首先结合岩土地下工程材料物理力学参数难确定性问题出发,通过广泛查阅国内外相关文献以及该地区具有类似地层的相关工程试验资料确定研究内容涉及参数的范围,进而结合现场测试的部分监测数据作为控制条件进行数值模拟分析进一步缩小参数比热、热膨胀系数的范围并最终确定取值大小；论文第二章推导了无限长径向分层模型计算冻结壁变形的应力、位移表达式,并以新上海一号煤矿地层为例对比了径向分层模型与非分层模型的冻结壁变形计算值,结果表明基于径向温度梯度的径向分层模型计算冻结壁变形比均质模型更接近实测值,该模型虽不能直接用于计算冻结壁变形,但是冻结壁材料非均质性对冻结壁变形分析具有重要影响的认识贯穿整篇论文的分析框架；论文第三章分析了弱胶结地层冻结壁变形的主要影响因素,并对主要影响因子中的部分具有交互作用的因子作了简化,确定正交模拟试验方案,考虑材料具有径向分层的特性建立了三维数值模型,进行了数值模拟计算,根据计算结果分析了各因子对冻结壁变形的影响,论文最后根据数值模拟结果分析了冻结壁变形各影响因子的敏感性。以上研究分析了弱胶结地层冻结壁变形的主要影响因素及其敏感性,为控制弱胶结冻结凿井冻结壁变形提供依据。更多还原

【Abstract】 The deformation effect factor analysis and safety control of the frozen wall during freezing sinking in poorly consolidated formations is another research topic after the problem of the safety control during freezing sinking in deep alluvium. This text combines the safety monitoring topic during freezing sinking of the New Shanghai No.1 Mine belonging to Shanghai Temple mining company in Inner Mongolia, and it consults relative domestic and foreign research literature.This text studies the effect factor and sensitivity of the deformation of freezing wall during freezing sinking in poorly consolidated formations by the combination of theoretical analysis and numerical simulation analysis. It provides foundation for freezing design of freezing shaft sinking project and construction safe control in similar formations of the area.This text proceeds from the difficulty of determining the physical and mechanical parameters of the material in underground rock engineering, and it consults relative domestic and foreign research literature and relative experimental data of similar formations of the area, then it determines the range of the parameter referred to in the research content. Then it analyzes partial monitoring data of the field test for numerical simulation analysis. The range of specific heat and thermal expansion coefficient of the parameters is further narrowed. Then the value is determined finally. In the second chapter of this text, the expression of the stress and displacement of the deformation of freezing wall in infinite layered model is deduced. And the text compares the calculating value of the deformation of freezing wall in radial layered model and non-layered model taking the formation of the New Shanghai No.1 mine as an example. The result indicates that the deformation of freezing wall of radial layered model based on radial temperature gradient is more close to measured value than the homogeneous model. Though the model cannot be used to calculate the deformation of freezing wall, the heterogeneity of the material of frozen wall has a major influence on the analysis of the deformation of freezing wall, which runs through the analytical framework of the whole text. The third chapter of this text analyzes the main influencing factors of the deformation of freezing wall, and it simplifies some interactive factors of the principal impact factors. Then the orthogonal simulation test scheme is determined. And a three-dimensional numerical model is created based on the fact that the material has the properties of being radially layered. And then numerical simulation is done. Then the text analyzes the effect of every factor on the deformation of freezing wall based on the calculating result. At last the text analyzes the sensitivity of all the impact factors of the deformation of freezing wall based on the simulation result.The above research analyzes the main influencing factors and the sensitivity of the deformation of freezing wall in poorly consolidated formations, and it provide a basis for controlling the deformation of freezing wall during freezing sinking in poorly consolidated formations.更多还原