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Award Abstract #0900351

Collaborative Research: Fiber-Optic Strain Monitoring of Rock Masses in Large Underground Facilities

NSF Org: CMMI
Div Of Civil, Mechanical, & Manufact Inn
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Initial Amendment Date: August 7, 2009
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Latest Amendment Date: August 7, 2009
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Award Number: 0900351
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Award Instrument: Standard Grant
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Program Manager: Richard J. Fragaszy
CMMI Div Of Civil, Mechanical, & Manufact Inn
ENG Directorate For Engineering
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Start Date: August 15, 2009
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End Date: September 30, 2013 (Estimated)
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Awarded Amount to Date: $603,801.00
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ARRA Amount: $603,801.00
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Investigator(s): Herbert Wang wang@geology.wisc.edu (Principal Investigator)
Dante Fratta (Co-Principal Investigator)
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Sponsor: University of Wisconsin-Madison
21 North Park Street
MADISON, WI 53715-1218 (608)262-3822
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NSF Program(s): GEOMECHANICS & GEOMATERIALS
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Program Reference Code(s): 025E, 037E, 1057, CVIS, 032E, 036E, 6890
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Program Element Code(s): 1634

ABSTRACT

This award is funded under the American Recovery and Reinvestment Act of 2009

(Public Law 111-5).

The 8000-ft deep Homestake Mine in Lead, SD is the proposed site for a Deep Underground Science and Engineering Laboratory (DUSEL). It is being operated today as the Sanford Underground Science and Engineering Laboratory (SUSEL) while it is being converted to readiness for construction. Although water flooded the mine up to the 4520-ft depth level, pumps have brought the water level below 4850-ft depth with plans to continue dewatering down to 8000 feet. In addition, it is anticipated that large, 50-to-60-meter span chambers will be excavated to house neutrino detectors. These activities present near-term and long-term opportunities to address long-standing geoscience and geoengineering questions about the mechanical and hydrologic response of rock masses at spatial scales ranging from centimeters to hundreds of meters and temporal scales ranging from milliseconds to decades. The objectives of this research are to (1) Advance the understanding of rock deformation over multiple scales of length and time and (2) Advance the technology of characterizing rock deformation. In addition, we see this project contributing to testing the hypothesis that critically-stressed fractures are hydraulically conducting over the range of scales of fractures found within the former mine. The work will also show how deformation relates to rock-mass characteristics.

Our research effort is a collaborative partnership among three U.S. universities, the University of Tokyo, the Japan Atomic Energy Agency, and private companies. The U.S. team will deploy current state-of-the-art deformation monitoring technologies based on Fiber Bragg Grating (FBG) and Distributed Strain and Temperature (DST) fiber-optic sensors at SUSEL. The FBG and DST sensors will be installed at the 4100-ft and 4850-ft levels in rooms and drifts adjacent to planned physics laboratories. The sensors will provide measurements at the meter scale over a region spanning several hundred meters. An array of tiltmeters will also be deployed at the 2000-ft, 4100-ft, and 4850-ft depth levels to provide deformation measurements, which are sensitive to solid-earth tides, over length scales between 10 and 100 meters. Temperature-sensing fiber will be placed in the water in the No. 6 Winze down to 8000-ft depth, in shorter-length boreholes, and along drift walls to monitor water inflows. In complementary research the Japanese team will deploy fiber-optic monitoring arrays at an underground vault in Aburatsubo and deep underground laboratories in Horonobe and Mizunami. They will also refine FBG deformation monitoring technology to improve resolution by one to two orders of magnitude.

UBroader Impacts: (1) The U.S. research team will gain international perspective and knowledge. Graduate students from Wisconsin, South Carolina, and Montana will be trained in multi-institutional, multidisciplinary research. (2) The training of students and teachers at the high school and college level in the EPSCoR (Experimental Program to Stimulate Competitive Research) states of Montana and South Dakota will be enhanced. (3) Multidisciplinary connections will accelerate the development of fiber-optic techniques for structural health monitoring. (4) The prototype fiber-optic sensor network will provide firsthand operational information about its capabilities to personnel at SUSEL. The methodology and research data will contribute to the design, construction, and safe operation of DUSEL.


PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH

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Q. Liu, T. Tokunaga, K. Mogi, H. Matsui, H. F. Wang, T. Kato, and Z. He. "Ultra-high resolution, multiplexed Fiber Bragg Grating sensor for crustal strain monitoring," IEEE Photonics Journal, v.4, 2012, p. 996. 

J. Volk, S. Hansen, T. Johnson, H. Jostlein, T. Kiper, V. Shiltsev, A. Chupyra, M. Kondaurov , A. Medvedko, V. Parkhomchuk, S. Singatulin, L. Stetler, J. Van Beek, D. Fratta, J. Roberts, H. Wang. "Hydrostatic Level Sensors as High Precision Ground Motion Instrumentation for Tevatron and Other Energy Frontier Accelerators," J. of Instrumentation (JINST), v.7, 2012, p. 1. 

J.R. Gage, D.O. Fratta, A. L. Turner, M. M. MacLaughlin, and H. F. Wang. "Validation and implementation of a new method for monitoring in situ strain and temperature in rock masses using fiber-optically instrumented rock strain and temperature strips," International Journal of Rock Mechanics and Mineral Sciences, v.61, 2013, p. 244. 

Gage, J.R., H. F. Wang, D. O. Fratta, A. Turner, M. M. McLalughlin. "Validation and implementation of a new method for monitoring in situ strain and temperature in rock masses using
fiber-optically instrumented rock strain and temperature strips," International Journal of Rock Mechanics and Mining Sciences, v.61, 2013, p. 244. 

Q. Liu, T. Tokunaga, K. Mogi, H. Matsui, H. F. Wang, T. Kato, Z. He. "Ultrahigh Resolution Multiplexed Fiber Bragg Grating Sensor for Crustal Strain Monitoring," IEEE Photonics Journal, v.4, 2012, p. 996. 

J. Volk, S. Hansen, T. Johnson, H. Jostlein, T. Kiper, V. Shiltsev, A. Chupyra, M. Kondaurov , A. Medvedko, V. Parkhomchuk, S. Singatulin, L. Stetler, J. Van Beek, D. Fratta, J. Roberts, H. Wang. "Hydrostatic level sensors as high precision ground motion instrumentation for Tevatron and other energy frontier accelerators," Journal of Instrumentation, v.7, 2012, p. P01004. 

BOOKS/ONE TIME PROCEEDING

Noni, M. MacLaughlin, and H. Wang. "Methods for attaching fiber optic strain sensors to rock in situ underground", 08/15/2009-07/31/2010,  2009, "14th Intermountain Conference on the Environment & 42nd Engineering Geology and Geotechnical Engineering Symposium, Pocatello, Idaho, Nov. 6, 2009, 8 pp.".

J. R. Gage, N. Noni, A. Turner, M. MacLaughlin, and H. F. Wang. "Fiber optic strain and temperature monitoring in crystalline rock at the Sanford Underground Science and Engineering Laboratory (SUSEL), Lead, South Dakota", 08/15/2009-07/31/2010,  2010, "44th U. S. Rock Mechanics Symposium and 5th U.S- Canada Rock Mechanics Symposium, Salt Lake City, Utah, June 27-30, 2010, 8 pp.".

M. MacLaughlin, N. Noni, A. Turner, J. Gage, and H. Wang. "Fiber optic strain gage installation at the DUSEL site", 08/15/2009-07/31/2010,  2009, "Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract H23E-1".

H. Matsui, Y. Kashiwai, O. Sano, T. Tokunaga, Z. He, Y. Mogi, and H. F. Wang. "Evaluation of the applicability of optical fiber strain sensors for monitoring rock deformation caused by ocean tide -a case study at the Aburatsubo site, Japan", 08/15/2009-07/31/2010,  2010, "Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract H23E-1010".

Noni, M. MacLaughlin, and H. Wang. "Methods for attaching fiber optic strain sensors to rock in situ underground", 07/30/2010-01/06/2011,  2009, "14th Intermountain Conference on the Environment & 42nd Engineering Geology and Geotechnical Engineering Symposium, Pocatello, Idaho, Nov. 6, 2009, 8 pp.".

J. R. Gage, N. Noni, A. Turner, M. MacLaughlin, and H. F. Wang. "Fiber optic strain and temperature monitoring in crystalline rock at the Sanford Underground Science and Engineering Laboratory (SUSEL), Lead, South Dakota", 07/30/2010-01/06/2011,  2010, "44th U. S. Rock Mechanics Symposium and 5th U.S- Canada Rock Mechanics Symposium, Salt Lake City, Utah, June 27-30, 2010, 8 pp.".

M. MacLaughlin, N. Noni, A. Turner, J. Gage, and H. Wang. "Fiber optic strain gage installation at the DUSEL site", 07/30/2010-01/06/2011,  2009, "Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract H23E-1".

H. Matsui, Y. Kashiwai, O. Sano, T. Tokunaga, Z. He, Y. Mogi, and H. F. Wang. "Evaluation of the applicability of optical fiber strain sensors for monitoring rock deformation caused by ocean tide -a case study at the Aburatsubo site, Japan", 07/30/2010-01/06/2011,  2010, "Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract H23E-1010".

 

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