为探究不同等级三向应力下水平层面对煤岩组合体力学特性的影响规律，通过对含有不同层面数（1层、2层、3层）的煤岩组合体开展变围压（4、9、15 MPa）的三轴力学试验，纵向对比了相同层数的煤岩组合体在变围压条件下的应力-应变响应特征和裂隙分布特征，横向分析了同等围压条件下不同水平层面数对组合体的力学行为（破坏特性）差异的影响。结果表明：随着围压的增加，煤岩组合体峰后性能呈现出由脆性破坏-延性破坏-脆性破坏的趋势，其弹性模量逐渐增大；随着水平层面数量增加，组合体三轴抗压强度降低，且岩石单元能够出现较为明显的破坏；水平层面具有改变裂隙发育路径的作用，围压增大有利于裂隙穿越界面而扩展发育；本结果可为探究深部开采过程中冲击地压频发的原因提供实验基础。

To explore the influence of bedding quantity on the failure behavior of coal-rock combination under triaxial stress conditions, a series of triaxial mechanical tests are conducted using coal-rock combination specimens (with bedding quantity of 1, 2, and 3) under different confining pressures (4, 9, and 15 MPa). The effect of confining pressure on the stress-strain relations and fracture distributions of coal-rock combination was analyzed with the same bedding quantity, and the effect of bedding quantity on the failure behavior of coal-rock combination was assessed under the same confining pressure. The results show that the failure of coal-rock combination transitions from brittle to ductile and then to brittle as the confining pressure increases, along with higher elastic modulus. In addition, the triaxial compressive strength of coal-rock combination decreases with the increase of bedding quantity, demonstrating evident rock failure at larger bedding quantity. In general, the presence of bedding can alter the fracture development path, whereas higher confining pressure can better lead to fracture development across boundaries. The findings from the triaxial mechanical tests on coal-rock combination can be used to explain the increasing potential of rock bursts during mining operation in deep underground.