Chen Zhe, Zhou Yue-Jin, Zhang Lei-Ming, Xu Yu-Nong
State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China.
School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China.
Materials (Basel). 2024 Feb 6;17(4):784. doi: 10.3390/ma17040784.
Based on the computed tomography scanning, which abbreviation is CT scanning, and fractal theory, geometric parameters of mudstone fissures are obtained. The physical model of a single fissured channel is obtained in combination with Barton standard curves and 3D printing technology, and similar materials of mudstone are developed based on the water absorption of natural mudstone to prepare single fissured water-absorbing grouting test blocks with different roughness levels for the grouting simulation testing. By analyzing the viscosity change characteristics of grouting slurry before and after grouting, the seepage characteristics of the grouting slurry in the rough fissures of the water-absorbing mudstone are revealed. The results show that when the roughness is small, the grouting slurry will have an obvious water loss effect after passing through mudstone fissures. However, with the flow of the slurry, the water loss effect of the subsequent grouting slurry will be weakened. For fissures with high roughness, the water absorption properties of the rough surfaces and the walls of the mudstone fissures work together, leading to the sedimentation and blockage of the fissure channels, thereby hindering the flow of slurry.
基于计算机断层扫描（简称CT扫描）和分形理论，获取了泥岩裂隙的几何参数。结合巴顿标准曲线和3D打印技术得到了单裂隙通道的物理模型，并基于天然泥岩的吸水性研制了泥岩相似材料，制备了不同粗糙度等级的单裂隙吸水注浆试验块用于注浆模拟试验。通过分析注浆前后浆液粘度变化特征，揭示了吸水泥岩粗糙裂隙中浆液的渗流特性。结果表明，粗糙度较小时，浆液通过泥岩裂隙后会有明显的失水效应。然而，随着浆液的流动，后续浆液的失水效应会减弱。对于粗糙度较高的裂隙，泥岩裂隙粗糙表面和壁面的吸水特性共同作用，导致裂隙通道沉积堵塞，从而阻碍浆液流动。
