Research on Flexible Formwork Concrete Filling for Retaining Tunnels
Leaving tunnels along the goaf can reduce the amount of excavation work and increase the recovery rate of coal resources in the mining face,which has significant promoting significance for improving the economic benefits of the mine.The 1307 working face is mining the 3#coal seam with a thickness of 7 meters,and a 30 meter coal pillar is used to protect the roadway.In order to achieve efficient mining of coal resources,it is proposed to apply the flexible formwork concrete filling and retaining roadway technology to the 1307 track roadway.By retaining the track roadway along the goaf,the 30 meter protection coal pillar resource recovery is achieved.Analyze the application plan and effect of flexible formwork concrete filling technology for retaining track tunnels.After on-site application,the deformation of the surrounding rock in the reserved section of the track roadway is relatively small,and the effect of retaining the roadway is more significant.
thick coal seamflexible formwork concreteleaving lanes along the goaflagging support
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