不规则孤岛工作面采动应力演化特征

本文以不规则孤岛工作面为研究对象,通过数值模拟,对工作面在回采期间应力的演化规律进行了分析。结果表明工作面的变化会造成采动应力传播的突变,工作面向不规则处推进时应力变化程度更大。工作面推进时导致采动应力在不规则巷道处更大,不规则处是防治冲击地压的关键。不规则孤岛工作面沿空送巷可有效降低应力集中程度,为类似工作面的回采提供指导。

Evolution Characteristics of Mining Stress in Irregular Island Working Face

In this paper,the irregular island working face is taken as the research object,and the stress evolution law of the working face during mining is analyzed through numerical simulation.The results show that the change of working face will cause the sudden change of mining stress propagation,and the stress change degree is greater when the working face advances in the irregular place.When the working face is advancing,the mining stress is greater in the irregular roadway,which is the key to prevent rock burst.Gob side entry feeding in irregular island working face can effectively reduce stress concentration and provide guidance for similar working face.