浅埋煤层工作面顺槽围岩支护技术的研究

Research on Supporting Technology of Surrounding Rock for Mining Face in Shallow Coal Seam

对浅埋煤层顺槽顶板的主要破坏形式进行分析,在顶板悬吊理论和松动圈理论的基础上对锚杆支护参数进行设计计算,并应用数值计算软件FLAC3D对其进行了模拟计算。计算结果表明:顺槽开挖后在一定范围内,随着距掌子距离的不断增加,顶板下沉量和两帮收敛量均出现增加趋势,达到一定值后下沉量和两帮收敛量趋于平稳。

This paper analyzes the main failure modes of surrounding rock for mining face in shallow coal seam, design and calculation of bolt support parameters based on roof suspension theory and loose ring theory, The numerical calculation software FLAC3 D was used to simulate the calculation. The calculation results show that after the excavation along the trough, within a certain range, with the increasing distance from the hand, the roof subsidence and the convergence of the two gangs tend to increase. After a certain value, the subsidence and convergence quantity tends to be steady.