Aiming at the mechanism of internal arch effect in slopes of open-pit coal mine under the influence of hidden goaf,a mechanical model of slope supporting arch structure under the influence of goaf was established by introducing correction factor k of slope arch circle thickness based on the supporting arch theory.The influence law of arch effect on the slope stability with goaf was discussed by combining theoretical analysis and numerical simulation.Assumptions and computational models for analyzing arch effects were constructed,and the thickness of arch ring,the horizontal reaction force and the maximum collapse height of arch were analyzed and calculated based on the mechanics theories of two-hinged arch in structural mechanics and material mechanics.The research results can be applied to the practice of slope stability prevention and control in open-pit coal mines affected by hidden goafs.
关键词
隐蔽采空区/支撑拱/拱圈厚度/拱效应/边坡稳定
Key words
hidden goaf/supporting arch/arch circle thickness/arch effect/slope stability
维普
万方数据