底抽巷开挖应力分布与变形破坏特征数值分析

Numerical Analysis on Stress Distribution and Deformation and Failure Characteristics for Floor Gas Drainage Roadway Excavation

底抽巷抽采瓦斯是解决高瓦斯煤层巷道掘进瓦斯突出问题的重要保障。结合贵州大方煤业小屯煤矿16中03工作面具体工程条件,对小屯矿底抽巷的开挖应力分布与变形破坏特征进行数值分析。结果表明:该底抽巷对其上运输煤巷的影响较小,底抽巷的位置设计参数合理。

Gas excavation in the floor gas drainage roadway is the good solution to prevent gas outburst in roadway excavation of the gas- sy coal seam. Combined with the specific project conditions of the 16-mido03 working face in Xiaotun Coal Mine,the stress distribution, deformation and failure characteristics of the floor gas drainage roadway excavation were studied by numerical analysis in this paper. The results show that ： the floor gas drainage roadway has little impact on the transportation roadway in the coal; the design parameters of the under-floor-gas-drainage-roadway are rational.