【作者】 李树刚； 林海飞； 成连华；

【Author】 Li Shugang, Lin Haifei, Cheng Lianhua( School of Energy Science and Engineering, Xi’an University of Science ft Technology,Xi’an 710054 China)

【机构】 西安科技大学能源学院；

【摘要】 综放开采后,上覆岩层中的离层裂隙和破断裂隙相互贯通后会形成一个动态变化的椭抛带分布。通过数值模拟和相似模拟实验相结合的研究方法,得出采动覆岩的卸压范围及煤岩碎胀系数分布特征;基于此,并应用采动裂隙椭抛带中瓦斯运移规律的耦合数学模型,得到采动覆岩中的瓦斯浓度分布规律。说明采动裂隙椭抛带是卸压瓦斯的运移和聚积带,为合理布置抽排煤层瓦斯系统提供了理论基础。更多还原

【Abstract】 After raining, a dynamic Elliptic Paraboloid Zone distribution would be formed if the bed-separated fissures and broken fissures of the overlying stratum were connected. Based on the research methods of connecting the numerical simulation with the model experiment, the zone of relieved pressure and the distribution feature of coal expansion factor in mining overlying stratum are obtained. On the basis of that, we apply the coupling mathematical model of the methane delivery law in the mining fissure Elliptic Paraboloid Zone, and obtain the distribution law of methane concentration in mining overlying stratum. It is explained that mining fissure Elliptic Paraboloid Zone is the delivery and collection zone of relieved methane. That will provide the theoretical basement for logical arranging the methane drainage system.更多还原