The coal-measure rock masses of China's Ordos Basin are mainly composed of typical soft rock with low strength, which bear loads together with the coal seams during coal mining activities. Accurately determining the mechanical behaviors of combination soft rock and coal masses can provide a basis for underground coal engineering designs. First, uniaxial compression tests were conducted on medium sandstone samples, coal samples, and coal-rock combination samples. It was observed that the peak axial strain, uniaxial compressive strength, stress-strain curve shape, and elastic modulus of the combination samples were closer to those of the coal samples, indicating that the mechanical characteristics of soft rock-coal combination samples were mainly affected by the coal. Then, using the static equilibrium and deformation continuous conditions, along with the Griffith strength criterion, the ultimate compressive strength of materials at different positions in a combination model was analyzed. The results revealed that the interface constraint effects had reduced the strength of the sandstone near the interface and improved that of the coal near the interface. The interface constraint effects were verified by comparing the generalized Poisson's ratio of materials at different positions with those of the standard coal and sandstone samples. Finally, based on the final failure modes, and the temporal characteristics of the acoustic emission (AE) count rate and peak frequency, the progressive failure mechanism of the soft rock-coal combination samples was studied. This failure process was found to be characterized by the synergistic failure of the material and structure. Furthermore, the effect of coal-rock height ratio on the strength of materials at different positions was discussed, which interpreted the experimental results observed in the previous related studies, namely, with the increase in the rock-coal height ratio, the strength of the combination samples had increased, and the impact tendency had been significantly enhanced.

鄂尔多斯盆地煤系岩体主要由典型的低强度软岩组成，在开采活动中随煤层一起承受载荷。准确确定软岩与煤体组合的力学行为可为地下煤炭工程设计提供基础。首先，对中等砂岩样品，煤样品和煤岩组合样品进行了单轴压缩试验。观察到组合样品的峰值轴向应变，单轴抗压强度，应力-应变曲线形状和弹性模量更接近于煤样品，表明软岩-煤组合样品的力学性能受到主要影响。由煤。然后，使用静态平衡和变形连续条件，结合格里菲斯强度准则，分析了组合模型中不同位置材料的极限抗压强度。结果表明，界面约束效应降低了界面附近砂岩的强度，提高了界面附近煤的强度。通过将不同位置的广义泊松比与标准煤和砂岩样品的泊松比进行比较，验证了界面约束效应。最后，基于最终的破坏模式，以及声发射计数率和峰值频率的时间特征，研究了软岩-煤组合样品的渐进破坏机理。发现该破坏过程的特征在于材料和结构的协同破坏。此外，