The reinforcement effect of grouting is different with different degrees of brokenness of rock mass, as this phenomenon is closely related to the groutability and reconstructability of the broken rock mass. In order to obtain the groutability and reconstructability of mudstones with different degrees of brokenness and their relationship, a permeability device was developed and used to test the permeability of broken mudstones with different particle sizes during the axial compaction process. A computed tomography (CT) scan, uniaxial compression, and non-contact full-field real-time measurement system VIC-3D tests were carried out on the grouted bodies of broken mudstone with different particle sizes. The results show that with the increase of the particle size (i.e., a decrease of the degree of brokenness), the porosity and crack opening formed by the accumulation of broken mudstone increase, so that its groutability will increase, while the volume defect ratio in the grouted body increases first and then decreases, so that its reconstructability decreases first and then increases. During uniaxial compression, the rock-rock contact and weak rock-cement interface in the grouted body are the initial locations of its re-failure, and the grouted body obtained by small particle size is mainly longitudinal splitting failure, while the grouted body obtained by large particles size is mainly shear failure. These above conclusions can provide an experimental data reference and valuable information for predicting and evaluating the groutability and reconstructability of the broken rock mass.

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破碎泥岩的注浆性和可重构性及其关系的实验研究

注浆的加固效果随岩体破碎程度的不同而不同，因为这种现象与破碎岩体的灌浆性和可重构性密切相关。为了获得具有不同破碎度的泥岩的灌浆性和可重构性及其关系，开发了一种渗透装置，用于测试轴向压实过程中不同粒径的破碎泥岩的渗透性。计算机断层扫描（CT）扫描，单轴压缩和非接触式全场实时测量系统VIC-3D测试是在不同粒径的破碎泥岩灌浆体上进行的。结果表明，随着粒径的增加（即破碎度的降低），破碎泥岩堆积所形成的孔隙度和裂缝开度增加，注浆性增加，而灌浆体中的体积缺陷率先增加然后减少，从而其可重建性先降低然后增加。在单轴压缩过程中，注浆体中的岩石-岩石接触和弱岩-水泥界面是其再破坏的初始位置，小粒径获得的注浆体主要为纵向劈裂破坏，而注浆得到的注浆体主要为纵向劈裂破坏。大粒径主要是剪切破坏。以上结论可为破碎岩体的注浆性和可重构性的预测和评价提供实验参考和有价值的信息。因此，其灌浆性将增加，而灌浆体中的体积缺陷率则先增加然后降低，从而其可重构性先降低然后增加。在单轴压缩过程中，注浆体中的岩石-岩石接触和弱岩-水泥界面是其再破坏的初始位置，小粒径获得的注浆体主要为纵向劈裂破坏，而注浆得到的注浆体主要为纵向劈裂破坏。大粒径主要是剪切破坏。以上结论可为破碎岩体的注浆性和可重构性的预测和评价提供实验参考和有价值的信息。因此，其灌浆性将增加，而灌浆体中的体积缺陷率则先增大然后减小，从而其可重构性先减小然后增大。在单轴压缩过程中，注浆体中的岩石-岩石接触和弱岩-水泥界面是其再破坏的初始位置，小粒径获得的注浆体主要为纵向劈裂破坏，而注浆得到的注浆体主要为纵向劈裂破坏。大粒径主要是剪切破坏。以上结论可为预测和评价破碎岩体的注浆性和可重构性提供实验数据参考和有价值的信息。因此其可重构性先降低然后增加。在单轴压缩过程中，注浆体中的岩石-岩石接触和弱岩-水泥界面是其再破坏的初始位置，小粒径获得的注浆体主要为纵向劈裂破坏，而注浆得到的注浆体主要为纵向劈裂破坏。大粒径主要是剪切破坏。以上结论可为预测和评价破碎岩体的灌浆性和可重构性提供实验数据参考和有价值的信息。因此其可重构性先降低然后增加。在单轴压缩过程中，注浆体中的岩石-岩石接触和弱岩-水泥界面是其再破坏的初始位置，小粒径获得的注浆体主要为纵向劈裂破坏，而注浆得到的注浆体主要为纵向劈裂破坏。大粒径主要是剪切破坏。以上结论可为预测和评价破碎岩体的注浆性和可重构性提供实验数据参考和有价值的信息。大粒径的灌浆体主要是剪切破坏。以上结论可为预测和评价破碎岩体的注浆性和可重构性提供实验数据参考和有价值的信息。大粒径的灌浆体主要是剪切破坏。以上结论可为破碎岩体的注浆性和可重构性的预测和评价提供实验参考和有价值的信息。