This research investigates how inserting notched gypsum filling between granite specimens affects their breakage under uniaxial compressive testing. Various thicknesses of gypsum filling slabs were placed between granite specimens, incorporating different dimensions and notch configurations. The investigated parameters include elastic modulus, Poisson’s ratio, uniaxial compressive strength, and Brazilian tensile strength of 5 GPa, 0.18, 7.4, and 1 MPa, respectively. Compression testing, at an axial load rate of 0.05 mm/min, was conducted on a total of 9 different models. Numerical simulations were performed on models with notched gypsum filling, varying thicknesses, and notch angles using Particle Flow Code in 2D. The results demonstrated that breakage behavior was primarily influenced by filling thickness and notch angle. The uniaxial compressive strengths in samples were found to be affected by fracture patterns and the breakage mechanism of the filling. The study revealed that the behavior of discontinuities is influenced by the number of induced tensile cracks, which increase with thicker filling. Acoustic emission (AE) hits during loading’s initial phase, a rapid increase in AE hits before the applied stress reached its peak, and significant AE hits accompanying each stress drop were observed. The breakage patterns and strengths were found to be similar in both experimental and numerical approaches.

这项研究研究了在花岗岩样本之间插入缺口石膏填充物如何影响其在单轴压缩测试下的破损。将不同厚度的石膏填充板放置在花岗岩样本之间，结合不同的尺寸和凹口配置。研究的参数包括弹性模量、泊松比、单轴抗压强度和巴西抗拉强度，分别为 5 GPa、0.18、7.4 和 1 MPa。在 0.05 毫米/分钟的轴向负载速率下，对总共 9 个不同的模型进行了压缩测试。使用二维粒子流代码对具有缺口石膏填充、不同厚度和缺口角度的模型进行数值模拟。结果表明，断裂行为主要受填充厚度和缺口角度的影响。研究发现样品的单轴抗压强度受到断裂模式和填充物断裂机制的影响。研究表明，不连续性的行为受到诱发拉伸裂纹数量的影响，随着填充厚度的增加，诱发拉伸裂纹的数量也会增加。声发射 (AE) 在加载初始阶段发生，在施加的应力达到峰值之前，声发射 (AE) 发生迅速增加，并且观察到伴随每次应力下降的显着 AE 发生。实验和数值方法中发现断裂模式和强度相似。