Designing for upper seam stability in multi-seam mining

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dc.contributor.authorZhou, Yingxinen
dc.contributor.committeechairHaycocks, C.en
dc.contributor.committeememberKarmis, Michaelen
dc.contributor.committeememberLucas, J.R.en
dc.contributor.committeememberFaulkner, Gavin J.en
dc.contributor.committeememberKuppusamy, Thangaveluen
dc.contributor.departmentMining and Minerals Engineeringen
dc.date.accessioned2015-07-10T20:00:12Zen
dc.date.available2015-07-10T20:00:12Zen
dc.date.issued1988en
dc.description.abstractThe problem of interaction resulting from mining seams above a previously mined seam has been thoroughly investigated in order to develop and evaluate methods of improving upper seam ground conditions when mining through either active or passive subsidence waves. Design criteria have been developed based on results from case studies, statistical analyses, geological characterizations, numerical studies, and physical modeling. These include identification of critical factors, prediction of the location and magnitude of potential interaction areas, and remedial options. Complete design procedures have been devised which include five essential steps: data collection and mapping, classification of mining conditions, characterization of strata, preliminary evaluations, and stability analyses. The methods developed for interaction analysis are classified into two categories: qualitative and quantitative. Qualitative methods can be used for a preliminary evaluation using rules of thumb and empirical formulas developed from statistical analyses. Quantitative methods involve more detailed stress and strain computations based on quantified interaction mechanisms. These mechanisms include trough subsidence, load transfer, pressure arch, large scale caving and fracturing, and interseam failure. Finally, in order to expedite the transfer of research findings to the field for application, an interactive and comprehensive computer program has been developed which incorporates all possible interaction mechanisms and aspects of the design and evaluation process for multi-seam mining.en
dc.description.degreePh. D.en
dc.format.extentxii, 202 leavesen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/54477en
dc.language.isoen_USen
dc.publisherVirginia Polytechnic Institute and State Universityen
dc.relation.isformatofOCLC# 18363681en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1988.Z567en
dc.subject.lcshMining engineeringen
dc.subject.lcshPillaring (Mining)en
dc.titleDesigning for upper seam stability in multi-seam miningen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineMining and Minerals Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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