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dc.contributor.authorDonovan, James G.en_US
dc.date.accessioned2014-03-14T20:37:47Z
dc.date.available2014-03-14T20:37:47Z
dc.date.issued1999-05-12en_US
dc.identifier.otheretd-052099-151416en_US
dc.identifier.urihttp://hdl.handle.net/10919/33050
dc.description.abstractA large percentage of Southern Appalachian coal reserves are located in seams less than 36" thick. As thicker and currently more mineable, deposits are exhausted, methods of underground thin-seam extraction will have to be developed. These methods must be capable of removing coal efficiently and economically. Past experience with highwall mining of thin-seam coal has indicated that recovery rates tend to be lower than in conventional operations. It is suspected that this will also apply to underground thin-seam mining, regardless of proposed technology or mining method. A method of increasing recoveries from thin-seam mining operations is necessary in order to exploit thin-seam reserves. Backfilling is one alternative that may find applicability in thin-seam coal mining. The ability of backfill to provide additional ground support may enhance coal recovery by allowing for the design of undersized pillars. Backfill has been used extensively in hard rock mining but has found limited use in coal mining. Its adaptability to thin-seam coal mining has been examined and is presented in this thesis. Backfill is capable of providing additional ground support by restricting lateral deformation of surrounding coal pillars and roof. This additional support can result in significant increases in recovery from thin-seam coal deposits. However, the overall feasibility of backfill is dependent on the in situ behavior of the fill material, the properties of the fill, the effects of the filling method on the total mining operation, and the cost of filling per extra ton of coal recovered. The influence of these parameters has been studied and indicate that, in certain situations, backfilling for the purpose of increasing recovery rates from thin-seam coal mines is feasible.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartThesis.pdfen_US
dc.relation.haspartVita.pdfen_US
dc.rightsI hereby grant to Virginia Tech or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation.en_US
dc.subjectcoal wasteen_US
dc.subjectthin-seam coal miningen_US
dc.subjectbackfillingen_US
dc.titleThe Effects of Backfilling on Ground Control and Recovery in Thin-Seam Coal Miningen_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.committeechairKarfakis, Mario G.en_US
dc.contributor.committeememberTopuz, Ertugrulen_US
dc.contributor.committeememberMcPherson, Malcolm J.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-052099-151416/en_US
dc.date.sdate1999-05-20en_US
dc.date.rdate2000-05-27
dc.date.adate1999-05-27en_US


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