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通过对江仓矿区四井田3723回风石门巷道变形机理的分析,提出了锚网+U形钢联合支护,既能适应高原软岩大变形,又具备较高的承载能力。通过提前打钻疏放水,可以从根源减弱巷道围岩变形,达到控制效果。现场实测分析表明,应用该技术能够有效保持回风巷围岩稳定。
Based on the analysis of deformation mechanism of 3723 return stone gateway in No.420 mine in Jiangcang mining area, the combined support of anchor net and U-shaped steel is proposed, which can not only meet the large deformation of soft rock in plateau but also possess high bearing capacity. By drilling in advance to divert water, the deformation of the surrounding rock of the roadway can be weakened from the root to achieve the control effect. Field measurement and analysis show that the application of this technology can effectively maintain the return airway rock stability.