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深入分析了国内外岩体水泥注浆理论存在的问题 ,从随机裂隙岩体结构模拟、注浆渗透规律及其随机性和各向异性特征以及注浆加固稳定性分析等几个方面建立了适合于巷道围岩注浆的渗流及加固后稳定性分析的模型 ,并在模型分析的基础上 ,建立了注浆施工设计准则。以非牛顿流体渗流过程为线索 ,深入研究了单裂隙、裂隙网络、拟连续介质体的非牛顿流体的渗流规律 ,并综合考虑了应力和渗流相互作用的效果 ;结合水泥浆液的流变特性 ,建立了较实用的注浆渗流系统模型 ,并和模拟实验具有较好的一致性 ;结合岩体裂隙分布的随机性特征 ,建立了注浆参数设计的可靠性准则 ,并深入分析了岩体裂隙随机分布参数对注浆参数设计的影响。最后以破裂后岩体加固前后的力学性质实验及分析为基础 ,建立了巷道注浆后围岩稳定性分析模型 ,并综合考虑了注浆滞后时间、支护与围岩相互作用等效果 ,从而为所建立的理论模型能真正地应用于实践提供了保障。
In-depth analysis of the existing problems of cement grouting theory of rock mass at home and abroad, from the simulation of random fractured rock mass structure, grouting infiltration law and random and anisotropic characteristics and stability analysis of grouting reinforcement and so on to establish a suitable Based on the model of the seepage and reinforcement stability of surrounding rock grouting in the roadway, and based on the model analysis, the design guidelines for grouting construction are established. Non-Newtonian fluid percolation process as a clue, in-depth study of single fracture, fracture network, pseudo-continuous media of non-Newtonian fluid percolation law, and comprehensively considered the effect of stress and seepage interaction; combined with the rheological properties of cement slurry, A more practical model of grouting seepage system is established and has good consistency with the simulation experiment. Based on the random characteristic of fracture distribution of rock mass, the reliability criterion of grouting parameter design is established, and the fracture of rock mass Influence of Randomly Distributed Parameters on Grouting Parameters Design. Finally, based on the experiment and analysis of the mechanical properties of rock mass before and after the rupture, the stability analysis model of surrounding rock after grouting is established and the effect of grouting lag time, interaction between support and surrounding rock and so on The establishment of the theoretical model can really be used in practice to provide a guarantee.