Korea Institute of Geoscience and Mineral Resources

Korea Institute of Geoscience and Mineral Resources (kigam)

Dae-Sung Cheon

Eui-Sub Park

Yong-Bok Jung

Chan Hyoung Park

Joong-Ho Synn

Dae-Gee Huh

Disclosed herein is a fixture structure for reusing an underground micro-seismic sensor, including: a sensor body configured to be inserted in a borehole and having a sensing portion for sensing micro seismic event; a first fixture portion formed at one surface of the sensor body; a second fixture portion coupled to the first fixture portion and configured to be fixed to a grouting member injected into the borehole; and a separation unit installed between the first fixture portion and the second fixture portion and configured to separate the first fixture portion and the second fixture portion from each other by external force.

Fixture structure for reusing underground micro-seismic sensor

Provided is a device for predicting an underground behavior by using an acoustic emission (AE) sensor, including: a waveguide rod having an elongated end to be inserted in a borehole; a plurality of acoustic emission sensors mounted on different positions of the waveguide rod; a wrapping layer configured to cover a circumferential surface of the waveguide rod such that a gap is formed between the waveguide rod and the wrapping layer; an acoustic emission generating layer filled into the gap and being homogeneous along a direction of the waveguide rod; and a grouting layer configured to fix the waveguide rod in the borehole.

Device for prediction underground behavior by using acoustic emission sensor and producing method thereof

Provided is a measuring apparatus with AE sensors, which detects the same AE signals with respect to the same events that damage a geotechnical structure, regardless of ground conditions and formations in the geotechnical structure, thereby collecting reliable AE signals. Also, provided is(are) an installing method of the measuring apparatus with the AE sensor, and a set of the measuring apparatus with the AE sensor.

Measuring apparatus with AE sensor, installing method thereof, and set of the measuring apparatus

Provided is a method of predicting failure in geotechnical structures using an AE method instead of a conventional displacement or stress measuring method, which belongs to a field of rock mechanics and geotechnical engineering. The method is a measurement technology for identifying signs of failure in geotechnical structures using Acoustic Emission (AE) signals generated by damage in the geotechnical structure and also providing management standard for failure prediction.

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Daejeon, South Korea

Dae-Sung Cheon