深埋背斜软层巷道围岩稳定性演化规律研究

发布时间：2019-06-05 05:21

【摘要】：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。
[Abstract]:Aiming at the stability of roadway surrounding rock in soft rock strata of deep buried anticlinal structure, the excavation of roadway in soft rock strata of deep buried anticlinal structure is studied by means of 70 sets of numerical models and field tests. The evolution law of surrounding rock stability characterization variables with stress field and roadway axial arrangement angle 伪 reveals the influence of roadway position arrangement and axial angle design on the stability of roadway surrounding rock in soft rock strata of deep buried anticlinal structure. The results show that: 1) the change of roadway layout position and axial arrangement angle 伪 in anticlinal structure has obvious influence on the stability of surrounding rock, and the influence of the latter is more significant; 2) the stability of surrounding rock in the middle wing of anticlinal structure is higher than that near the ridge line. In the design of roadway layout, the influence of position and axial angle on the stability of surrounding rock should be considered comprehensively, and the roadway should be arranged on the side which is beneficial to the stability of surrounding rock.
【作者单位】：煤炭科学研究总院开采研究分院;中国矿业大学深部岩土力学与地下工程国家重点实验室;江苏建筑职业技术学院;
【基金】：国家自然科学基金项目(51574223) 江苏自然科学基金项目(BK20160208) 江苏省创新计划项目(KYLX15_1403)
【分类号】：TD322.4

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