The forming of a subsidence area in stope will produce unfavorable innuence on hydrogeological condition,and the rain permeated into the stope will produce the harm to different degree.

• 采矿塌陷区的形成，对采场上覆岩体的水文地质条件产生不利的影响，降雨渗入到采场将造成不同程度的危害。