关键词: 深部巷道, 黏弹塑性, 破裂膨胀, 应变软化

Abstract: With the coal mine excavated deeper gradually, strain softening, swelling fracture and rheology of the rock appear around deep and high stress underground roadways. The stress, displacement and radius of cracked region are obtained, after linear softening model is built and visco-elastoplastic mechanics analysis on the deep underground roadway surrounding rock is done. According to an example based on the research background of the mudstone roadways in the shaft station of Yuncheng coal mine in Shandong province, the failure and deformation character of rocks have been analyzed with the influence of swelling fracture and strain softening. The result shows that both swelling and softening have played an important role on the deformation of roadway and the thickness of cracked region. The deformation and failure under coupled action is more serious than the other situations, and softening action is more disadvantaged to the stability of surrounding rocks than swelling. After comparing the data from actual measurement with the theoretical value，it proves the correctness of the research.

Key words: deep underground roadway, visco-elastoplastic, swelling fracture, strain softening deep underground roadway, visco-elastoplastic, swelling fracture, strain softening