Abstract: Numerical simulation are made on shotcrete and bolt support of main deep tunnel of a coalmine by Ansys, the forces situation of the supporting structure and its supporting role has been discussed. It analyzed the distribution rules of the stress and displacement of the surrounding rock mass when the tunnel is supported. After mutual authentication with the field observations and experiment, the analysis result is proved to be practical.

Key words: Numerical simulation, Drucker-Prager yield criterion, Surrounding rock mass stress, Shotcrete and bolt support