Abstract: In order to effectively control the deformation and failure of soft rock entry, rock structure and physical mechanics parameters and ingredient and field monitoring have been used in 1522-1 mining entry. Experiments indicate that the roof and floor belong to swelling soft rock and that the fractures in coal are well generated. Thus the reliability of the end bolt and bolt strength is depressed and difficult to form stability and effective load bearing structure. The support way can’t make rock-mass stress balanced, with the deformation of roof-floor and sides big and floor protrude serious. It can’t meet the requirement of deformation character of surrounding rock in the soft rock roadway. Based on experiments and field monitoring, the cause of deformation and failure of weakness rock mining roadway is obtained. The full length anchoring bolt and net support and reasonable parameter are put forward, which achieves good application effect.

Key words: soft rock, rock-mass characteristics, destruction mechanism, influencing factor, mining entry, bolt net support