目前,公认的影响采面底板突水因素有水压、矿压、地质构造和隔水层强度,其中矿压是重要因素,它对底板突水起诱导和触发的作用,故减少采动矿压对底板的影响是防治采面带压开采底板突水的有效途径。本文应用岩石力学的矿压理论和光测弹性方法,结合现场实测资料,分析采空底板的应力分布及其采空尺寸对底板突水的影响 At present, it is generally accepted that there are water pressure, rock pressure, geological structure and water barrier strength of water inrush on the floor of mining face, of which the rock pressure is an important factor, which induces and triggers water inrush from the floor, The effect of pressure on the floor is an effective way to prevent water inrush from the mining floor with pressure mining. In this paper, using the theory of rock pressure of rock pressure and the method of optical measurement and elasticity, combined with the field measurement data, the influence of the stress distribution of the mined floor and the mined-out size on the floor water inrush