中文摘要：

从理论上分析采煤工作面回采后底板隔水层受力状态的变化规律和空间分布特征，通过对采煤工作面底板隔水层中岩体应力随采掘过程变化特征的观测研究，验证和揭示理论分析结果的正确性和客观存在，通过钻孔测试回采工作面底板岩层渗透性能随采掘过程的变化规律。分析回采工作面底板应力状态变化对诱发底板突水的内在机制，得出随着工作面的推移底板隔水层中张应力区交替推移的重要认识，张应力区一般位于距回采迎头0～20m范围内，张应力区岩层渗透系数较其他区域大，这一范围是工作面回采过程中最易于发生底板高压水突出的位置。

英文摘要：

Stress distribution and its change regulation in floor rock mass of mining face with mining progress are analyzed in theory and the theory analysis results are proved by vertical stress in roof and floor of mining face which are measured and detected in boreholes with mining process. The change regulation of rock permeability in floor of mining face are tested in boreholes with mining progress. The relationships among mining, rock stress and water inrush from floor of mining face are studied. It is understood that there is a 0 - 20 m distance tensile stress area in floor rock of mining face and this area process with mining progress. The permeability of rock mass in tensile stress area is much bigger than other parts and it is easier to induce water inrush from floor of mining face.