Discussion on Mining Technology of Oorebody Under Surface Industrial Building in a Mine
The closer the stope is to the surface,the greater the impact on the settlement of the sur-face,so the mining of near-surface orebodies is easy to cause excessive deformation of the upper surface and damage the building structure.In order to solve the problem of mining orebodies under surface build-ings,the appropriate mining technology is determined through the analysis of geological data and mining technical conditions,and the room-and-pillar method can effectively retain the primary pillar and improve the roof support effect.Then,the stope size is calculated comprehensively by means of Platts pressure arch theory,K.B.Rubenieit empirical formula and structural mechanics method.Finally,according to the stope span size,the load calculation range is determined,the allowable bearing strength calculation method is used to determine the point column load,and the final size of the point column is determined.The results of practice in a mine show that the room and pillar method can control the surface deformation well.The re-search results can provide reference for similar mining.
mining under buildingsnear-surface orebodystope spanpoint pillar
万方数据
维普
