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探讨了目前防隔水煤(岩)柱留设计算公式存在的缺陷,通过分析老空区边界以及掘进巷道两帮围岩受力特征及其破坏状态,提出防隔水煤(岩)柱应为三部分组成:掘进巷道两帮塑性区、防隔水煤(岩)柱中间弹性区、以及老空区边缘塑性破坏区。结合极限平衡以及材料力学相关理论,提出了老空区侧掘进巷道防隔水煤(岩)柱留设公式。经实例验证该计算公式是可行的。
In this paper, the existing defects of the formula for formulating the design of anti-sequestration coal (rock) columns are discussed. By analyzing the force of the surrounding rock and the failure status of the two surrounding rocks of the roadway, It is composed of three parts: two plastic zones of driving roadway, middle elastic zone of anti-sequestration coal (rock) column, and plastic damage zone on the edge of the old empty zone. Combined with the theory of limit equilibrium and material mechanics, a formula for setting up water-proof coal (rock) pillar on the side-entry roadway of Laoguo area is put forward. It is feasible to verify the formula by example.