Analysis on damage and rheological characteristics of deep surrounding rock of shaft engineering

<正> According to the characteristics of deep engineering surrounding rock main shaftof No.3 mining district in Jinchuan, electron microscope scanning and rock mechanics testwere adopted to analyze the damage features of rock.The software of FLAC3D and Burgersbody （Kelvin-Maxwell model） were used to research on rheological theory, and rheologicalmodel was modified.The results indicate that the damage of rock mass is very serious, andthe rheological characteristics also outstanding; rheological behavior of deep surroundingrocks of the shaft can be taken as superposition of transient and stable rheology; and thereexist the most dangerous zone on 100 m higher than 1 063 m level, so it is necessity thatworks of monitor and corresponding reinforcement should strengthen.