Abstract: To study the influence of deep irregular island face mining on rock burst, based on the spatial structure theory, the characteristics of overburden structure above island face 3112 have been analyzed in this paper, and the effect of large scale fracturing on the coal and rock has also been analyzed. Also the dynamic information monitored by microseismic monitoring system during roadway excavation has been added for the dynamic evaluation of rock burst risk at the working face. Meanwhile, through theoretical analysis and numerical simulation, the mechanism of rock burst induced by static and dynamic combined load in island pillar coal face has been analyzed. Based on energy conservation law, the release and conversion of the energy at the moment of the key strata fracture have been studied. Subsequently, the influence law of different mining scale effect on island pillar burst has been studied with the method of numerical simulation. The greater the mining scale is，the higher the risk of rock burst will be. Finally, the technologies in controlling rock burst have been developed for island face based on the mechanism. The engineering application has presented that strong tremors can be reduced by releasing pressure through large diameter drilling and break-tip blast in deep hole.

Key words: island face, rock burst, T strata, dynamic evaluation, numerical simulation