Constructing method for tunnel using mobile mixer having hopper for supplying steel fiber

Provided is a tunnel construction method using a movable mixer having a steel fiber supply hopper. The present invention can construct tunnels within minimum time, and can improve the safety of workers by constructing the tunnels using shotcrete with a movable mixer on which a steel fiber supply hopper is mounted. Also, when mine tunnels are constructed using the shotcrete, the present invention can put the steel fiber into the movable mixer without tanglement and can automatically supply the steel fiber. The tunnel construction method using simple shotcrete timbering as tunnel timbering comprises the steps of: excavating the facing of the tunnels; putting equipment into the tunnels to remove excavated rock; supplying spray concrete arranged in the tunnels using the movable mixer on which the steel fiber supply hopper is mounted; putting a shotcrete pump car into the tunnels as placing equipment; and placing the shotcrete on the ceiling and side walls of the tunnels using the shotcrete pump car. The present invention automatically supplies the steel fiber discharged from the steel fiber supply hopper to a mixing auger. [Reference numerals] (AA) Simple timbering (Shotcrete);(BB) Start;(CC) No;(DD) Yes;(EE) End;(S110) Excavate the facing of mine tunnels;(S120) Put equipment to remove excavated rock (Use a loader and a dump truck);(S130) Supply materials into the tunnels using a movable mixer on which a steel fiber supply hopper is mounted;(S140) Put placing equipment (Shotcrete pump car) into the tunnels;(S150) Placing shotcrete;(S160) Is the simple timbering constructed completely?