本文在系统的实验与理论研究基础上,考查了周围应力与孔隙流体对突出煤变形与破坏的影响.提出了一个描述破坏后现象的模型,其判据是一个联系着有效围压与材料强度的无量纲参数.实验表明,吸附瓦斯对应力-应变曲线没有明显影响;有效应力中的孔隙压力项就是游离瓦斯的压力;含气体与液体的多孔介质会有不同有效应力关系. Based on systematic experiments and theoretical studies, this paper examines the effect of surrounding stress and pore fluid on the deformation and failure of outburst coal.A model describing the after-failure is proposed, which is based on a model that relates effective confining pressure to material strength The experimental results show that the adsorption gas has no significant effect on the stress-strain curve, and the pore pressure in the effective stress is the pressure of the free gas. There are different effective stress relations between the porous medium containing gas and liquid.