Zhang Xuanning, Wang Ende
Department of Geology, College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China.
Polymers (Basel). 2024 Sep 15;16(18):2612. doi: 10.3390/polym16182612.
Polymer grouting materials are increasingly used in the filling of mine fissures. Unlike conventional inorganic grouting materials, the self-expansion of polymers adds complexity to their diffusion process within the crack. The objective of this research was to examine how polymer grouting material spreads in cracks at ambient temperatures and pressure. The investigation involved conducting grouting tests and performing numerical fluid simulation calculations using the finite-volume method in the computational fluid dynamics software, ANSYS FLUENT 2022 R1. The fluid volume approach was employed to determine the boundary between fluid and air and to ascertain the variation patterns of density in the slurry and the fracture system. This study applied the principles of fluid mechanics to investigate the patterns of variation in the physical characteristics of polymer grouting materials, including their density, pressure, flow velocity, and movement distance, during the diffusion process. The results indicated that the density of the polymer grouting material decreased exponentially over time throughout the diffusion process. With the increase in the grouting's volume, the grout's pressure and the permeable distance of the grout increased. The slurry's pressure near the grouting hole exceeded the other points' pressure. The physical parameters of the slurry were numerically simulated by ANSYS FLUENT 2022 R1 software, and the results were compared with the experimental data. After comparing the numerical simulation results with the test data, it was clear that the numerical simulation method was superior in accurately predicting the distribution pattern of each parameter of the polymer slurry during diffusion. The grouting volume, pressure distribution, and real-time change in the position of the flow of slurry could be efficiently determined through numerical calculation and simulated grouting tests. This work can offer valuable information for designing polymer grouting materials used in underground mine fissures.
高分子注浆材料越来越多地应用于矿山裂隙充填。与传统无机注浆材料不同，聚合物的自膨胀特性使其在裂缝中的扩散过程更为复杂。本研究的目的是考察高分子注浆材料在常温常压下在裂缝中的扩散情况。研究包括进行注浆试验，并使用计算流体力学软件ANSYS FLUENT 2022 R1中的有限体积法进行数值流体模拟计算。采用流体体积法确定流体与空气的边界，并确定浆液和裂隙系统中密度的变化规律。本研究运用流体力学原理，研究了高分子注浆材料在扩散过程中密度、压力、流速和移动距离等物理特性的变化规律。结果表明，在整个扩散过程中，高分子注浆材料的密度随时间呈指数下降。随着注浆量的增加，浆液压力和浆液渗透距离增大。注浆孔附近浆液的压力超过其他点的压力。利用ANSYS FLUENT 2022 R1软件对浆液的物理参数进行了数值模拟，并将结果与实验数据进行了比较。将数值模拟结果与试验数据进行比较后发现，数值模拟方法在准确预测高分子浆液扩散过程中各参数的分布规律方面具有优势。通过数值计算和模拟注浆试验，可以有效地确定注浆量、压力分布以及浆液流动位置的实时变化。这项工作可为地下矿山裂隙高分子注浆材料的设计提供有价值的信息。
