The instability caused by the fault slip is one of the main factors that induce the occurrence of coal bursts. To in-depth understand the mechanisms responsible for coal bursts during the underground coal seam mining, a mechanical model used to calculate the stress distribution on fault surface and illustrate the fault slip characteristics is proposed by considering the mining-induced stress. In order to verify the validity of this model, a set of comparative analyses with experimental results which have been published in the previous studies are carried out. The results show that the normal and shear stress distribution on the fault surface calculated by the mechanical model is approximately consistent with the experimental stress results. According to the calculated stress distribution on the fault surface, normal and reverse faults formation mechanism are explained by this mechanical model when the lateral pressure coefficient is greater than 1.0 and less than 1.0. Meanwhile, fault potential energy is proposed to research the energy storage and further explain the mechanism of fault slip. In addition, the coal bursts occurrence induced by fault slip is also discussed according to the engineering background and this mechanical model.

断层滑动引起的失稳是诱发煤爆发生的主要因素之一。为深入了解地下煤层开采过程中发生煤爆的机理，提出了一种考虑开采应力的力学模型，用于计算断层表面应力分布并说明断层滑动特征。为了验证该模型的有效性，进行了一组与先前研究中已发表的实验结果的比较分析。结果表明，正应力和剪应力分布力学模型计算的断层表面与实验应力结果基本一致。根据计算得到的断层表面应力分布，该力学模型解释了侧压系数大于1.0且小于1.0时正反断层的形成机制。同时，提出断层势能研究能量存储，进一步解释断层滑动机制。此外，还根据工程背景和该力学模型讨论了断层滑动引起的煤爆发生。