有限元法对矿井煤柱的结构分析——因果分析

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根据改进了的杜鲁克尔—培拉戈尔(Drucker—Prager)理论,使用三维空间有限元模拟试验法(3—D FEM)来分析对覆盖层厚63m,开采5.5m×5.5m回采煤柱的安全系数。研究结果表明开采是安全的,这已由井下观测结果所证实。但是,在不同的情况下,通常是用三个煤柱设计公式来计算安全系数。本文论述了模拟试验情况和分析在3—D FEM方法和传统的煤柱计算公式之间的差异。
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