This paper puts forward a new mechanism of water inrush through the seam floor (WISF).It is emphasised that water inrush is a local destabilization caused by defects.

• 本文论述了矿井煤层底板突水是一种由缺陷诱导的局域失稳，特别强调存在两种时间尺度的缺陷变化过程。