中文摘要：

针对顶板运动瓦斯异常涌出的问题,基于空气动力学原理及牛顿第二定律,分析瓦斯涌出与顶板载荷、采空区高度、顶板面积等影响因素的关系,建立了顶板垮落—瓦斯涌出的耦合模型,借助COMSOL多物理场耦合软件,以大同塔山煤矿二盘区8214工作面为例,根据其顶板垮落特征分析了上覆顶板分层垮断下的采空区瓦斯涌出规律,并通过现场监测数据进行了对比分析。研究表明：顶板垮断时,采空区瓦斯大部分将涌入工作面上隅角和高抽巷,其瓦斯浓度呈现短时间内急剧增大后减小的变化,且涌出量的大小与顶板载荷、采空区高度、顶板面积等有着直接关系;顶板垮落时上层比下层造成更大量的瓦斯涌出,且上隅角瓦斯浓度变化尤为明显。

英文摘要：

Aiming at the problem of gas abnormal emission from roof movement, based on Newton secondary law and air dynamics principle, analyzed the relationship between gas emission and roof load, height of goaf, roof area and other factors,the model of gas emission with roof caving was built. In this paper, the 8214 working face of Erpan in Tashan was selected to analyze the gas emission law in the goal under the overlying strate with the aid of COMSOL multi-physical field coupling software; The result shows that when the layered roof rock caving , the most of mining goaf gas will be poured into the working face corner and the high pumping lane, the gas concentration in the short time increases sharply and then decreases, and the amount of emission is directly related to the roof load, the height of the mined out area and the area of the roof; Hard roof caving upper caused more gas emission than the lower, and the upper corner gas concentration change is obvious.