The paper analysed the maximum damage depth of the working face floor. Based on the result, the relationship between roof pressure and water-irruption from floor are discussed.

• 从矿山压力角度分析采煤工作面底板破坏带最大深度产生的时间和位置，进而探讨顶板来压和底板突水之间的关系，最后给出工作面来压和非来压期间，底板究水的可能性。