Abstract:

To provide guidance and basis for the selection of support form and  the design of support parameters of deep gob-side entry,the action mechanisms of two support forms, i.e. I-steel set support and bolt support with wire mesh, bar and cable were analyzed from the aspect of structural mechanics, and then  their supporting effects were investigated by physical simulation in the laboratory. The supporting principle of cable was analyzed based on the interrelation between the key bearing layer and the secondary one. The results showed  that the bolt support with wire mesh, bar and cable was  the perfect support form because it can well meet the requirement of deep gob-side entry for support, and  the primary role of the roof cable is to link the key bearing layer and the secondary one, which can greatly increase the stability of surrounding rocks.

Key words: deep mine; gob-side entry; support form; structure analysis; physical simulation