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dc.contributor.authorBurke, Lisa Michelleen_US
dc.date.accessioned2014-03-14T20:36:36Z
dc.date.available2014-03-14T20:36:36Z
dc.date.issued2003-04-02en_US
dc.identifier.otheretd-05132003-150725en_US
dc.identifier.urihttp://hdl.handle.net/10919/32692
dc.description.abstractTo date, research has not focused on the behavior of concrete block stoppings subjected to excessive vertical loading due to roof to floor convergence. For this reason, the failure mechanism of stoppings under vertical loading has not been fully understood. Numerical models were used in combination with physical testing to study the failure mechanisms of concrete block stoppings. Initially, the behavior of a single standard CMU block was observed and simulated using FLAC. Full-scale stoppings were then tested in the Mine Roof Simulator and modeled using UDEC. Through a combination of physical testing and numerical modeling a failure mechanism for concrete block stoppings was established. This failure mechanism consists of development of stress concentrations where a height difference as small as 1/32â exists between adjacent blocks. These stress concentrations lead to tensile cracking and, ultimately, premature failure of the wall.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartthesis_final2.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectUDECen_US
dc.subjectnumerical modelingen_US
dc.subjectFLACen_US
dc.subjectstoppingsen_US
dc.titleNumerical Modeling for Increased Understanding of the Behavior and Performance of Coal Mine Stoppingsen_US
dc.typeThesisen_US
dc.contributor.departmentMining and Minerals Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineMining and Minerals Engineeringen_US
dc.contributor.committeechairWestman, Erik Christianen_US
dc.contributor.committeememberIannacchione, Anthony T.en_US
dc.contributor.committeememberKarfakis, Mario G.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05132003-150725/en_US
dc.date.sdate2003-05-13en_US
dc.date.rdate2003-05-30
dc.date.adate2003-05-30en_US


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