Influence of filling mining on ground stability in a metal mine

Large-scale mining of metal mines is likely to form a large area of goaf underground, which is easy to cause large-scale ground subsidence and goaf collapse. The vibration caused by underground blasting construction has an impact on the stability of ground buildings, which is easy to cause various geological disasters. Based on the actual mining project of Xianglushan Tungsten Resources, the vibration effect of underground filling mining on ground building structure is studied in combination with surface subsidence observations. The results show that the underground blasting construction has little effect on the ground vibration. The maximum vibration velocity of the ground surface caused by blasting is 0.04 cm/s, the maximum vibration velocity of the roof of the building is 0.05 cm/s, and the other measuring points are less than 0.02 cm/s. The filling mining method can effectively control the surface subsidence and reduce the influence on the stability of the superstructure. The local maximum sedimentation of the mining area is 0.009 m, the maximum uplifted value is 0.006 m, and the deformation is small. The monitoring results meet the requirements of the corresponding specifications. The ground buildings in the mining area are relatively safe and their normal use is not affected. The research results presented here can provide reference for the safe production of similar metal mines.