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| Site Overview | | | History | | | Maps | | | Gallery | | | Project updates |
Subsidence Monitoring
GSHI, with the assistance of Agapito Associates, installed Time Domain Reflectometry (TDR) technology to monitor sub-surface caving, similar to monitoring subsidence in long wall coal mining. The TDR method involves grouting a coaxial cable in a borehole located over a mine void. The cable is interrogated by sending an electrical impulse down the cable. Any cable deformation will reveal any rock deformation, providing advance warning of additional collapse. These monitoring devices have been installed near the Isabella/Eureka Mines, the Mary Mine, and the Tennessee/Cherokee Mines, all identified as areas having significant potential for future collapse.
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Glenn Springs Holdings, Incorporated
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