Abstract: Aiming at the problem that the deep roadway was deformed seriously, and the traditional support could not guarantee stability of roadway, this paper proposed idea of reinforcement continuous double-shell of the deep roadway based on analyzing deeply the deformation characteristics of deep surrounding rock and analyzed its reinforcement mechanism. The nude roadway, anchor support, deformation of surrounding rock in continuous double-shell support roadway and stress distribution rule of roadway under different deep mining conditions were studied through imitation test with similar materials. The results showed that with the mining depth increasing, the self-stability of the surrounding rock in nude roadway couldn’t be maintained for it was damaged largely; that there was potential failure risk for the bolt support roadway because its deep surrounding in inlet anchorage zone was destroyed in abscission layer; and that the local shear failure for continuous double-shell support roadway occurred in the shallow part wall of roadway and the stability of surrounding rock was good. The example of the new-southern roadway support of Tao-er coal mine proved the reasonability of continuous double- shell’s support.

Key words: deep roadways, continuous double-shell support, support mechanism, grouting