硅化双液注浆加固河流相细砂层工程应用研究

发布时间：2018-05-26 23:34

本文选题：河流相细砂层 + 硅化双浆注浆　；参考：《西安科技大学》2015年硕士论文

【摘要】：韩城矿业公司下峪口煤矿新建皮带平硐建设过程中遇到长度近千米的黄河古河道沉积的河流相沉积细砂层,应用传统方法无法穿越,新的河流相沉积细砂层注浆加固方法成为矿山建设面临的重要难题,针对这一难题,论文以下峪口煤矿皮带平硐穿越粉细砂层具体地质条件为背景,提出硅酸凝胶材料注浆加固与支护技术。论文首先对所获得的各种地层参数进行了系统分析,修正了存在严重偏差的土的基本力学参数,补充给出了砂层的土性指标;根据室内实验数据,分析计算并给出了对注浆加固工程十分重要的地层注浆参数:土体的灌注系数?;从硅化双浆浆材物质组成入手,通过微观化学反应分析,明晰了硅化双浆浆材加固土样强度的变化机理;系统研究了基于理想牛顿流体注浆介质假定前提的柱状扩散和球状扩散条件下的Maag渗透注浆理论,用压力水头关系和浆液渗透系数对Maag公式进行了补充完善;引入土体孔隙的浆液注入系数即灌注系数的概念,分别对基于传统经典理论推导的柱状扩散和球状扩散的Maag渗透注浆理论公式进行了修正;应用模拟砂体室内注浆试验结果,对按照传统经典理论建立起来的柱状渗透扩散条件下的maag公式、补充完善后的公式和新建立的修正公式进行了计算分析比较,证明了修正公式的合理性;运用建立的柱状渗透扩散的修正Maag公式,通过对地面试验数据的分析,获得了硅化双浆注浆加固所需的注浆参数,并巧妙地利用自然地理优势,设计了一套非常有效的含水砂层排泄水方案,为下峪口煤矿运煤平硐的掘进应用打下了基础。通过论文研究,有效地控制了下峪口煤矿在建运煤平硐自身的变形和上部地层的变形,确保了工作面及地面建筑的安全稳定,获得了显著经济技术和社会效益。
[Abstract]:During the construction of the new belt adit in Xiayukou Coal Mine of Hancheng Mining Company, the fluvial sedimentary fine sand layer deposited in the ancient Yellow River channel with a length of nearly km is encountered, and the traditional method cannot be used to traverse it. The new reinforcement method of fluvial sedimentary fine sand layer has become an important problem in mine construction. In view of this problem, the concrete geological conditions of belt adit passing through silt layer in the following Yukou coal mine are background. The reinforcement and support technology of silicic acid gel material by grouting is put forward. In this paper, the various formation parameters obtained are analyzed systematically, the basic mechanical parameters of soil with serious deviation are corrected, and the soil property index of sand bed is given. The parameters of grouting are analyzed and calculated, such as the grouting coefficient of soil, the material composition of silicified double slurry, and the micro chemical reaction analysis. The mechanism of strength change of soil samples strengthened with silicified double slurry is clarified, and the Maag permeation grouting theory based on the assumption of ideal Newtonian fluid grouting medium is studied systematically under the condition of columnar diffusion and spherical diffusion. The Maag formula is supplemented by the pressure head relation and the slurry permeability coefficient, and the concept of grouting coefficient is introduced into the soil pore. The theoretical formulas of Maag permeable grouting based on the traditional classical theory are modified, and the results of indoor grouting tests of simulated sand bodies are used. The maag formula under the condition of columnar permeation diffusion established according to the traditional classical theory is calculated and compared with the newly established modified formula, and the rationality of the modified formula is proved. By using the modified Maag formula of columnar permeation diffusion and the analysis of the ground test data, the grouting parameters needed for the reinforcement of silicified double grouting are obtained, and the natural geographical advantages are used skillfully. A set of very effective drainage scheme of water-bearing sand bed is designed, which lays a foundation for the driving application of coal transport adit in Xiayukou Coal Mine. Through the research of the paper, the deformation of the coal cavern under construction and the deformation of the upper stratum in Xiayukou Coal Mine are effectively controlled, and the safety and stability of the working face and the ground building are ensured, and the remarkable economic, technical and social benefits are obtained.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD350

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