According to the tested mechanical performance of coal sample, the plastic softening process of stress-strain curve is thought to be about a cubic curve, and the plastic softening theory about coal layer is used to deduce the inflection equation of roof.
根据煤样力学性能测试结果,把煤柱应力应变曲线的塑性软化阶段近似为三次曲线,应用煤层塑性软化理论,推导出了顶板弯曲方程。
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