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针对深埋背斜构造软岩地层巷道围岩的稳定性问题,通过70组数值模型并结合现场试验,研究了在深埋背斜构造的软岩地层中开挖巷道后,围岩稳定性表征变量随应力场和巷道轴向布置角度α变化的演化规律,揭示了深埋背斜构造软岩地层中巷道位置布置与轴向角度设计对巷道围岩的稳定性影响。结果表明:1)背斜构造中巷道布置位置和轴向布置角度α的变化均对围岩稳定性产生明显影响,且后者的影响更加显著;2)背斜构造中两翼处的围岩稳定性高于脊线附近,在进行巷道布置设计时,应综合考虑位置与轴向角度对围岩稳定性的影响,并将巷道布置在有利于围岩稳定的一侧。
Aiming at the stability of surrounding rock in soft rock strata with deep anticline, the stability of surrounding rock is studied by means of 70 numerical models combined with field experiments after excavation of roadway in soft rock strata with deep buried anticline The variable follows the evolution of the stress field and the angle α of the roadway, and reveals the influence of the roadway position and axial angle design on the stability of surrounding rock in the soft rock strata with the deep anticline. The results show that: 1) the change of the roadway layout position and the axial arrangement angle α in the anticline structure have a significant impact on the stability of the surrounding rock, and the impact of the latter is more significant; 2) the stability of the surrounding rock at the two wings in the anticline structure When the design of roadway layout is adopted, the influence of the position and axial angle on the stability of the surrounding rock should be comprehensively considered and the roadway should be arranged on the side that is conducive to the stability of the surrounding rock.