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针对在褶皱区构造应力作用下回采巷道底板冲击频发的问题,基于底板冲击发生的力学条件,以某矿250206上工作面为工程背景,借助弹性薄板理论对回采巷道在水平构造应力作用下底板冲击发生的原因进行了分析,建立了底板失稳破坏的力学模型,通过理论推导计算出了底板发生失稳破坏的临界载荷表达式,并给出了底板所受水平应力的计算公式,最后对底板冲击危险性系数进行了修正。
Aiming at the problem of frequent impact on mining floor under the tectonic stress in the fold zone, based on the mechanics conditions of the floor impact, taking the work face of a mine 250206 as the engineering background, with the elastic thin plate theory, the floor of the mining roadway under the horizontal tectonic stress The reason of the impact is analyzed. The mechanical model of the instability of the bottom plate is established. The critical load expression of the instability failure of the bottom plate is calculated by theoretical derivation, and the formula of the horizontal stress of the bottom plate is given. Finally, Base plate impact hazard factor was amended.