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Keywords: stopper
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Proceedings Papers

Paper presented at the ISRM SINOROCK 2013, June 18–20, 2013
Paper Number: ISRM-SINOROCK-2013-131
.... In this paper, a new sensor for monitoring ground deformation ahead of mountain tunneling face is intro- duced. The sensor consists of plastic optical fiber, color filter film, sliding stopper and so on, using LED as the light source. Laboratory experiments were con- ducted to verify the applicability...

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