Analysis and Research on the Stability of Filling Roof in Wide and Large Stope
The popularization and application of the filling mining method have innovated the underground mining mode and pillar mining mode of metal mines,and improved the safety and recovery rate of resources.However,for the mining of the top pillar resources in the wide and large stope,it is often necessary to set a certain thickness of the top pillar to maintain the stability of filling body,resulting in resources waste.Therefore,the stability of filling roof in wide and large stope was studied.Through the theoretical calculation of roof stability,combined with the slurry ratio test of filling body,the roof structure optimization and strength design were studied.The roof structure and strength requirements of filling body under different spans at 20 m sublevel height were obtained,and FLAC3D was used for simulation verification.The simulation results show that using the designed filling body as the direct roof of the medium-deep hole stope has a good stability and can meet the strength requirements.The research results can provide a reference for the design of filling roof in wide and large stopes.
万方数据
维普
