关键词: 神经网络, 围岩稳定性, 喷锚支护, 智能系统

Abstract: The shotcrete and bolt support in parameter is based on the stability level of surrounding rock. The neural network was adopted to identify the stability of surrounding rock in underground tunnel. And the MBP (modified Back Propagation) model is built for identifying the stability of surrounding rock. In combination with the indirect engineering approximation and integral reinforce theory with the artificial intelligent technology as expert system，the intelligent system for designing of shotcrete and bolt support engineering has been developed and also certified to be correct by a project case. 

Key words: Neural network, Stability of surrounding rock, Shotcrete and bolt support, Intelligent system