| 摘要 |
PROBLEM TO BE SOLVED: To provide a displacement measuring device and a displacement measuring method attaining real-time monitoring of the displacement of the natural ground in front of a working face with the advance of the working face and attaining continuous and stable excavation. SOLUTION: A borehole H is bored in the working face Ta, and a displacement gage 3 is installed and fixed in the borehole H. The displacement gage 3 detects the displacement of the natural ground M, and the detected displacement data is transmitted to a receiving device 5 in a bord T by a radio signal. Since the transmission of the displacement data from a transmitting part 13 to the receiving device 5 is performed not by wire but by the radio signal, there is no hindrance to the advance of the working face Ta following the excavation of the natural ground M. The displacement of the natural ground M with the advance of the working face Ta can thereby be monitored in real time, and continuous and stable excavation can be performed. COPYRIGHT: (C)2010,JPO&INPIT
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