Abstract: In order to effectively prevent and control pressure bumping during mining of near-vertical extra-thick coal seam group, take south mining area of Wudong coal mine in Urumqi mining area as research object, impact reason of 87° near-vertical super thick coal seam group was analysed , key and difficult points of rock burst prevention and control of this kind of coal seam was explored,self-protection pressure relief prevention and control method were put forward , and pressure relief and impact prevention effect of this method was analysed. The research shows that rock burst of near-vertical coal seam group mainly occurs in the first coal seam. Main reason is that roadway is located in the high stress area caused by superposition of abutment pressure and horizontal tectonic stress, which enhanced rock burst risk. Taking self protective pressure relief measures for the first coal seam can not only change stress environment of coal and rock mass, transfer the high stress area generated by superposition of abutment pressure and horizontal tectonic stress to deep coal and rock mass, place roadway of mining face in the low stress area, but also change properties of coal and rock, and make it lose possibility of gathering a lot of elastic properties, so as to prevent occurrence of pressure bumping.

Key words: near-vertical coal seam, rock burst, self protection pressure relief, first mining coal seam, prevention and control