Abstract: The influences of the variation of bolt space on the tunnel deformation and the bolt stress under different depressurized rate are analyzed with FLAC3D The tunnel deformation damage with the pressure relief mining under the bolting support in Chambishi copper mine of Zambia and that with the anchor bolt support in Jinshandian iron mine of Wusteel are comparedThe theoretical analysis and the project cases show that the pressure relief can effectively control the tunnel deformation levelAnd the bolt support does not mean to control the tunnel distortion but coordinate the tunnel distortion of around rock massTherefore，in the high ground pressure area，the primarily work is to control the ground pressureAlso，together with effective support method and parameters，the stability of the tunnel deformation can be maintained well

Key words: High stress area, Ground pressure control, Bolt support, Stability