PROBLEM TO BE SOLVED: To muck debris from tunnel of a small section efficiently. ;SOLUTION: A plurality of muck cars 20 running forward and backward in prescribed allotted sections are allocated on tracks between the vicinity of a face 2 of a tunnel extended with the advance of the face and a pithead 8 of the tunnel. The muck produced at the face 2 is put in a container bag 10 which is brought into the vicinity of the face 2 and set temporarily in a folded state. The container bag 10 fully loaded with the muck is carried toward the pithead 8 by the muck car 20 waiting at a starting point A. The container bag 10 is transferred from the muck car 20 arriving at a load transfer point B, the terminal of the prescribed allotted section, to the subsequent muck car 20 waiting to run for carriage through the next section. Furthermore, cyclic running wherein the muck car 20 emptied after the operation for transfer returns to the starting point is executed for each of the allocated muck cars 20, and thereby the muck produced at the face 2 of the tunnel is brought to the pithead 8 thereof.;COPYRIGHT: (C)2000,JPO
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