采空区顶板大面积垮落的空气冲击灾害研究

Research on Air Bumping Disaster Induced by Large Roof Falling in Goaf

基于近年来采场顶板大面积垮落所形成空气冲击灾害的频发性与严重性,在总结以往研究结果的基础上,用矿压理论与流体力学理论的分析方法,论证了长壁采场空气冲击灾害发生的客观条件、灾害模式、研究的重点内容、解决问题的途径以及最新研究进展。主要结论有:采场空气冲击灾害的发生条件与灾害模式是存在差异的;顶板垮落的空气冲击灾害过程存在共性,均需考察冲击时间、灾害程度以及防灾工程设计与防治等;应用非稳态可压缩流体的理论研究该问题。

Due to the high frequency and serious of the air bumping disasters induced by the large roof falling in the goat in the passed years, base on the previous research results, the analysis method with the rock pressure theory and the fluid mechanics theory was applied to demonstrate the objective conditions, disaster mode, research key content, resolution access and the new research and development of the air bumping disaster occurred in the longwall coal mining face. The main conclusions are that there would be differences in the induced conditions and the disaster mode of the air bumping disasters occurred in the coal mining faces and there would be an universality in the air bumping disaster procedure of the roof falling. Both would need to investigate the bumping time, disaster degree, disaster control engineering design and the prevention and control. The instability compressed fluid theory could be applied to research the problem.