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中文摘要：
受回采工作面采动影响，位于承压含水层上部的回采工作面底板产生破坏，完整岩层厚度减小，阻水能力降低，底板突水可能性增加。运用塑性理论和矩形薄板理论得出了底板最大破坏深度以及完整岩层带厚度计算公式的数学表达式，并根据东庞煤矿9103回采工作面的基本条件，试算了底板临界厚度，并与实测数据进行了对比分析，结果表明计算得出的破坏深度与实测值基本吻合。
英文摘要：
Influenced by mining, the coal-mining face floor above the confined water aquifer will be ruptured, the thickness of the intact rock stratum will reduce, the capability of water-resisting will be weakened and the possibility of floor water inrush will increase. By applying the theory of plasticity and rectangular thin plate , the damage depth of working face floor and the thickness of intact rock stratum are worked out. According to the basic condition of 9103 working face of Dongpang Coal Mine, the critical thickness of the working face floor is calculated.
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