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dc.contributor.authorThomas, William Roberten
dc.date.accessioned2016-11-12T07:00:25Zen
dc.date.available2016-11-12T07:00:25Zen
dc.date.issued2015-05-21en
dc.identifier.othervt_gsexam:4680en
dc.identifier.urihttp://hdl.handle.net/10919/73426en
dc.description.abstractAn extensometer has been developed to continuously monitor roof extension in underground mines. The extensometer is designed to be installed in the MSHA-mandated test holes in the roof and measures the displacement between an anchorage point at the top of the borehole and the hole in the roof of the excavation. Once installed, the extensometer will report displacement through semi-wireless communications network. The extensometer is hard-wired into the permissible MIDAS datalogger, where results can be obtained wirelessly via the MIDAS user interface. Lab tests have indicated that the device produces displacement data. The device was installed in one underground coal mine to review its effectiveness in the field.en
dc.format.mediumETDen
dc.publisherVirginia Techen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectExtensometeren
dc.subjectConvergence Monitoringen
dc.titleDevelopment of a Wireless Borehole Extensometer for Monitoring Convergence in Underground Minesen
dc.typeThesisen
dc.contributor.departmentMining and Minerals Engineeringen
dc.description.degreeMaster of Scienceen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineMining Engineeringen
dc.contributor.committeechairWestman, Erik Christianen
dc.contributor.committeememberKarfakis, Mario G.en
dc.contributor.committeememberRipepi, Nino S.en


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