考虑不同初始垂向应力、不同初始水平应力及不同应力转移速度条件，借助于自主研发的采动应力试验系统，研究了非均布荷载作用下煤岩体的力学强度特性。研究结果表明：煤岩外部损伤残余块体对煤岩内部力学承载能力具有强化作用，当初始垂向应力、初始水平应力、应力转移速度一定时，煤岩内部力学承载能力近似为煤岩外部力学承载能力的2倍；伴随初始垂向应力的增加，煤岩整体后期力学承载能力不断降低，且处于不同初始垂向应力范围，煤岩内、外部后期力学强度递减特征不同，当处于较小初始垂向应力范围时，煤岩外部后期力学强度递减量大于煤岩内部，当处于较大初始垂向应力范围时，煤岩外部后期力学强度递减量小于煤岩内部；初始水平应力越大，煤岩体的力学承载能力越高，且无论较小还是较大初始水平应力范围，煤岩内部后期力学强度增量总大于煤岩外部；伴随应力转移速度的增加，煤岩峰值强度不断升高，应力转移速度对煤岩内部区域力学性质的影响相对较大。

The strength characteristics of coal-rock under non-uniform distributed load are investigated using a self-developed mining-induced stress testing system under different conditions of initial vertical stresses, initial horizontal stresses and stress transfer velocity. The results show that the external damaged coal-rock block has strengthened effect on the bearing capacity of internal coal-rock blocks. When the initial vertical stress, the initial horizontal stress and the stress transfer velocity are fixed, the internal bearing capacity of coal-rock is approximately twice that of the external coal-rock. With the increase of the initial vertical stress, the later period bearing capacity of the whole coal-rock is reduced and is located in the range of different initial vertical stress. There exists a difference in decreasing characteristics between internal- and external coal-rock. When under a lower initial vertical stress range, the reduction of strength of external coal-rock in the later period is higher than that of internal coal-rock. When under a relatively high initial vertical stress range, the reduction of mechanical strength of external coal-rock in the later period is lower than that of internal coal-rock. The higher the initial horizontal stress is, the higher the bearing capacity of coal-rock is. No matter in a higher or lower initial stress range, the incremental quantity of the later period bearing capacity of internal rock-coal is larger than that of external rock-coal. With the increase of stress transfer velocity, the peak strength of coal-rock is increased, and the effect of stress transfer velocity on the mechanical properties of internal coal-rock is more significant.