Research on rockburst tendency analysis and control support design of deep gold mine

Deep mining is the only way for the future development of mines.Under the influence of deep high ground stress environment, there is engineering risk of rock burst during mining, especially in deep hard rock metal mines.Aiming at the rock burst problem of deep gold mine, the field stress test and indoor rock loading and unloading test are carried out with Fushan Gold Mine as the engineering background.The elastic deformation energy index of rock mass at different locations is obtained, the rock burst tendency of rock mass is analyzed, and the rock burst prevention and control support technology under different rock mass quality is proposed.The results show that the direction of the first principal stress and the third principal stress are close to the horizontal, and the ratio of the average horizontal principal stress to the dead weight stress is between 1.02 and 1.09, indicating that the ground stress field of the mining area is dominated by the horizontal tectonic stress.The upper wall of rock mass and the inner elastic deformation energy of rock mass are low, and there is non-rockburst tendency, while the lower wall has weak rockburst tendency.By comparing the difference of anti-explosion safety factor of rock mass under full-length resin bolt support, resin bolt + energy absorbing bolt reinforcement support and simple energy absorbing bolt support, differentiated support schemes are proposed for permanent roadway and temporary roadway under different surrounding rock conditions.