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WORKING FACE FRONT PROBING DEVICE AND WORKING FACE FRONT PROBING METHOD
WORKING FACE FRONT PROBING DEVICE AND WORKING FACE FRONT PROBING METHOD
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机译:工作面前部探测装置和工作面前部探测方法
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摘要
PROBLEM TO BE SOLVED: To easily and accurately probe a state of a bed lock by directly photographing an inner surface (bore wall) of a boring hole having been drilled in almost horizontal direction as a state of bare hole when probing the state of the bed lock in front of a tunnel working face.;SOLUTION: A working face front proving device includes a boring hole 10 drilled almost in horizontal direction to the front of a working face, a packing material 20 which is translucent and is packed in the boring hole 10, a bore hole camera 30 capable of being inserted in the boring hole 10, and a display device 50 which displays an image taken with the bore hole camera 30. The bore hole camera 30 is preferred to be set at a tip end part of a hollow pipe (support rod 40).;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2017,JPO&INPIT
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