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根据谢一矿-960 m水平C15顶板运输大巷工程实际,通过对巷道深部围岩变形监测及分析底鼓影响因素,获得了巷道顶板、两帮及底板围岩动态变形特征及底鼓主要原因,认为在两帮与顶板支护后,巷道应力和变形集中到支护体系薄弱的底板释放,发生强烈的挤压流动型底鼓。在此基础上,提出并实施了注浆加固顶帮围岩、底板锚索和底板胶囊管帷幕注浆的深井巷道底鼓综合控制技术,同时配用自行加工制造的风动底板锚索钻机,有效解决了底板锚索孔施工难题。工程实践表明,该技术能有效控制深井巷道底鼓,保持巷道长久稳定。
According to the actual project of the C15 roof transportation laneway at the level of -960 m at the level of -960 m in Xie Yi Mine, the dynamic deformation characteristics and the main reason of the bottom drum are obtained by monitoring the deformation of deep surrounding rock in the tunnel and analyzing the influencing factors of the bottom drum. It is considered that the stress and deformation of the roadway concentrate on the weak base plate of the support system after the two supports and the roof support, and a strong squeeze flow type bottom drum occurs. On this basis, the comprehensive control technology of deep tunnel roadway drum with grouting to reinforce top wall rock, floor anchor cable and floor capsule curtain grouting is put forward and implemented. At the same time, the self-processing pneumatic floor anchor cable drilling machine is proposed, Effectively solve the construction of the anchor hole in the floor. Engineering practice shows that this technology can effectively control the bottom drum of deep mine roadway and maintain long-term stability of the roadway.