中文摘要：

从理论上对煤体孔隙壁面扩展位移进行了分析，在此基础上，提出了外力扰动条件下的瓦斯吸附分子转变为游离态的判断依据；开展了外力扰动条件下的煤样瓦斯解吸实验方案设计与实施，并对实验数据进行了处理；对扰动诱导煤与瓦斯突出等动力灾害的机理提出了新的解释。研究结果显示，在外力扰动条件下，煤体对瓦斯的吸附平衡被打破，游离瓦斯所占的比例有所增大，瓦斯压力上升，煤与瓦斯突出等动力灾害发生的动力增加。

英文摘要：

The expanding displacement of porous coal wall was theoretically analyzed, and then the judgement that the adsorbed methane molecules converted to free state under the external disturbing force was proposed. The methane desorption experiments of coal samples were car-ried out under the external disturbing force and the obtained data were organized. Moreover, the new explanation was put forward for the mechanism of dynamic disasters such as the coal and gas outburst induced by external disturbance. The results showed that the adsorption equilibrium of methane on coal body was broken due to the external disturbance. The proportion of free methane increased, resulting in the increase of methane pressure. So the driving force of coal and gas out-burst also increased.