中文摘要：

借鉴煤层底板隔水层阻水性能的相关研究成果,建立了煤层底板弹性岩梁力学模型,分析了底板隔水层应力分布特征,讨论了底板破断后的结构及其稳定性,提出了煤层底板突水发生的判据,对矿井防治水具有指导意义。

英文摘要：

With the references to the related study achievements on the water resistance performances of the water insulation layer under the seam floor,a mechanics model of the elastic rock beam under the seam floor was established.The stress distribution features of the water insulation layer under seam floor were analyzed.The post failure structure and the stability of the seam floor were discussed.The criteria of the water inrush occurred from the seam floor was provided and could have the guidance to the mine water prevention and control.