Study On Chaobuleng Metal Mine Blasting Mining Influence On Roadway

It is the main way of our country and the whole world to use blasting to carry on the exploitation of the underground ore body.The energy produced by the blasting operation in the ore rock will be transmitted through the rock medium to the surrounding,which will influence the stability of the underground structure of the mine.Through to Chaobuleng Iron and Zinc Polymetallic Mine No.2 shaft connected four middle research,on site collected blasting vibration signal processing,using FLAC3 D finite difference software simulation under different stress condition of surrounding rock stability,and the middle part of +910m roadway in different types of stress wave under the action of force and displacement of the results of the analysis should.The calculated results indicate that the surrounding rock of roadway under gradient stress dangerous position is essentially the same,plastic zone change presented the nonlinear growth,especially the two sides and bottom position even more;laneway surrounding rock under the action of shear wave by tensile and shear force overt threats and latent in the failure area is stress and longitudinal wave wider.Effect of longitudinal wave to the surrounding rock is mainly reflected an increase in the tensile stress on the floor.