Multi-seam mining of the deep Waterberg resources.

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dc.citation.doihttp://dx.doi.org/10.17159/2411-9717/2016/v116n11a5en_ZA
dc.citation.epage1042en_ZA
dc.citation.issue11en_ZA
dc.citation.spage1037en_ZA
dc.contributor.authorChabedi, C.K.
dc.contributor.authorZvarivadza, T.
dc.date.accessioned2017-02-14T06:56:18Z
dc.date.available2017-02-14T06:56:18Z
dc.date.issued2016-11
dc.description.abstractThis paper discusses the difficulties associated with the potential exploitation of the deep multi-seam resources east of the Daarby fault in the Waterberg coalfield. The resources occur at a depth greater than 250 m and the thickness of the coal is roughly 110 m, but the top 50 m comprises coal intercalated with shale and the bottom 60 m contains five seams with sandstone and shale partings. Various factors affecting multiple seam mining at these great depths are discussed with reference to lessons learned from local and international experience on multi-seam mining. Field geological and geotechnical data was utilized to assess the stability of the roof of the seams. There is no specific rock mass rating for the Waterberg area, therefore approximate coal mine roof rating (CMRR) values were used to propose appropriate support strategies. Analysis of Multiple Seam Stability (AMSS) was used to analyse the strength of the parting or interburden between the various seams, the mining sequence, and the interaction between the various seams. The research indicated that it is possible to mine seams with a low CMRR at high mining rates using longwall mining, although support for gateroads is expected to be expensive, time-consuming and onerous to install, and will impact gateroad development rates. It will not be possible to simultaneously mine zones in close proximity and failure of the interburden is predicted, thus dangerous mining conditions are anticipated. However, it will be possible to mine just two of the eleven zones using longwall mining.en_ZA
dc.description.librarianMvdH2017en_ZA
dc.description.urlhttp://www.saimm.co.za/publications/journal-papersen_ZA
dc.identifier.citationChabedi, C.K. and Zvarivadza, T. 2016. Multi-seam mining of the deep Waterberg resources. Journal of the Southern African Institute of Mining and Metallurgy. 116(11), pp.1037-1042. http://dx.doi.org/10.17159/2411-9717/2016/v116n11a5en_ZA
dc.identifier.issn2225-6253
dc.identifier.urihttp://hdl.handle.net/10539/22011
dc.journal.titleJournal of the Southern African Institute of Mining and Metallurgy.en_ZA
dc.journal.volume116en_ZA
dc.language.isoenen_ZA
dc.publisherThe Southern African Institute of Mining and Metallurgy.en_ZA
dc.rights© This Journal provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge.en_ZA
dc.subjectAnalysis of Multiple Seam Stabilityen_ZA
dc.subjectAMSSen_ZA
dc.subjectCMRRen_ZA
dc.subjectCoal miningen_ZA
dc.subjectLongwallen_ZA
dc.subjectMulti-seam miningen_ZA
dc.subjectWaterbergen_ZA
dc.subjectCoal depositsen_ZA
dc.subjectCoal mine roof ratingsen_ZA
dc.titleMulti-seam mining of the deep Waterberg resources.en_ZA
dc.typeArticleen_ZA
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