Considering the implementation of passive support in advanced sections of mining roadways, which is associated with consumption of manpower and material resources and an increase in safety risk during working face advancement, with 360,608 mining area of Xinji No. 1 Coal Mine selected as contextual foundation of engineering project, a mechanical model of key roof block caving based on broken structure is established, the advanced support strength of roadway roof is determined, the roadway support design is optimised, and the feasibility of support scheme is verified via theoretical analysis, computational modeling, and on-site monitoring. The findings indicate that, owing to the influence of mining disturbance, it is essential to implement proactive advance support in the ahead area. This helps improve the load distribution in the surrounding strata and blocks stress transfer path, thus lowering the risk of local roof instability and enhancing the overall strength of the surrounding geological formations. A comparison of numerical simulation results that the displacement and stress around roadway are significantly reduced after implementing the reinforcement scheme. Field measurements also demonstrate a reduction in the displacement in the vicinity of the roadway and the tension in on the anchor cables. Therefore, the feasibility and effectiveness of the active support scheme to enhance roadway stability are verified.
Keywords: Active advance support; Field monitoring; Mining roadway; Numerical simulation.
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