巨厚推覆体对深部回采巷道矿压分布规律研究

Study on Distribution Law of Super Thick Nappe on Mine Pressure of Deep Stoping Roadway

在巨厚推覆体下进行采掘活动,矿压分布规律复杂,围岩变形破坏控制难度大。为了获得巨厚推覆体下回采巷道矿压分布规律,以新集一矿360801工作面为工程背景,通过FLAC^(3D)数值模拟研究,得到了推覆体厚度、岩性以及推覆体位置对回采巷道的影响。研究结果表明:推覆体存在时的巷道变形量和集中应力均大于无推覆体的情况,回采巷道围岩变形量与推覆体厚度呈负相关,推覆体岩性和推覆体位置的改变对回采巷道的影响较小。

Mining and excavation activities are carried out under the super thick nappe,and the mine pressure distribution law is complex,making it difficult to control the deformation and failure of surrounding rocks.In order to obtain the mine pressure distribution law in the stoping roadway under the super thick nappe,taking the 360801 working face of Xinji No.1 Mine as the engineering background,the influence of the thickness,lithology,and position of the nappe on the stoping roadway is obtained through FLAC^(3D) numerical simulation research.The research results indicate that both the deformation amount and concentrated stress of the roadway in the presence of the nappe are greater than those in the absence situation of the nappe.The deformation amount of the surrounding rock in the stoping roadway is negatively correlated with the thickness of the nappe,and changes in the lithology and position of the nappe have a relatively small impact on the stoping roadway.