“两硬”近距煤层沿空留巷技术研究

Study on gob-side entry retaining technology of "two hard" close coal seam

针对"两硬"近距煤层顶板运动特点,采用现场实测、FLAC3D数值模拟的方法,分析巷道围岩变形规律,建立了适于"两硬"近距煤层顶板强运动特征"顶柔底强"组合巷旁支护力学模型,确定了巷道围岩支护方式及支护参数以及充填体的最优尺寸,留巷效果显著。

According to the roof movement characteristics of the"two hard"close seam,the methods of the site measure?ments and FLAC3D numerical simulation are used to analyze the deformation law of roadway surrounding rock,the me?chanics model of the"soft top and strong bottom"combined roadway support for the"two hard"close coal seam roof mo?tion characteristics is established,the surrounding rock supporting method,supporting parameters and the optimal size ofthe filling body are determined,the effect of gob-side entry retaining is remarkable.