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煤柱可设想划分为两区:核区和屈服区。中部核区处于承受三轴应力状态,其外围被屈服区包围,并受它约束。文中阐述了两带应力分布的近似规律,利用这个规律可以计算各种形状和尺寸的煤柱所承受的荷载。对煤柱周围采空区的应力分布也作了考虑,得出近似的煤柱分担荷载,将煤柱所承受的荷载公式与煤柱分担荷载公式列成等式,即可确定适应各种条件的煤柱尺寸。
Coal pillars can be imagined divided into two areas: the nuclear zone and yield zone. The central nuclear zone is under triaxial stress and its periphery is surrounded by and constrained by the yield zone. In this paper, the approximate rule of stress distribution in two zones is elaborated. By using this law, the loads on pillars of various shapes and sizes can be calculated. The stress distribution in the goaf around the coal pillar is also taken into consideration, and the approximate load sharing of the coal pillar is obtained. By formulating the load formula of the coal pillar and the formula of the coal pillar load sharing formula, it can be determined that various conditions Pillar size.