由于水砂充填工艺和技术设备的不断改进,以及深部开采控制地压活动等的需要,在我国地下矿山中,水砂充填采矿法得到了一定的应用。在实践中,充埴体表面破坏,充填料混入矿石中而引起的二次贫化,是一个突出的问题。研究充填体表面破坏引起的经济损失、破坏原因及改善途径,是很有实意际义的。 Due to the continuous improvement of water sand filling technology and technical equipment, as well as the need of deep mining to control ground pressure activities, the water sand filling mining method has been applied in underground mines of our country. In practice, filling the body surface damage, filling material mixed with ore caused secondary replenishment is a prominent issue. It is very realistic and meaningful to study the economic loss caused by the destruction of the filling body surface, the reasons for the damage and ways to improve it.