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Rock Mechanics Studies During Continuous Miner Bases Coal Pillar Extraction in Indian Coalfields
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SYSNO ASEP 0447888 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Rock Mechanics Studies During Continuous Miner Bases Coal Pillar Extraction in Indian Coalfields Author(s) Ram, S. (IN)
Kumar, D. (IN)
Koníček, Petr (UGN-S) RID, ORCID
Singh, A. K. (IN)
Kumar, R. (IN)
Singh, A. Kr. (IN)
Singh, R. (IN)Number of authors 7 Source Title Transactions - ISSN 0254-8003
Roč. 111, April 2014-March 2015 (2015), s. 89-104Number of pages 16 s. Publication form Print - P Language eng - English Country IN - India Keywords mining ; mechanized depillaring scenario ; rock mechanics Subject RIV DH - Mining, incl. Coal Mining Institutional support UGN-S - RVO:68145535 Annotation Indian coal mining industry has introduced a number of fully mechanized depillaring operations/faces at depth of cover ranging from 60 m to 377 m. Nature of overlying strata of these depillaring faces varied widely; from highly laminated, weak and easily caveable to massive, strong and difficult to cave. These mechanized depillaring operations are, generally, carried out at difficult site conditions but performance monitoring in field showed good production, productivity and safety results. Application of roof bolts as breaker line support for this technology worked well for moderate overlying roof strata but experienced difficulties for, both, extremely weak and strong/massive overlying roof strata. It is observed that the performance of a breaker line support at the goaf edge deteriorated with an increase in depth of cover of the depillaring face. Practice of a straight line of extraction (single row of pillars) during the mechanized depillaring below competent roof strata experienced considerably large hanging area inside the goaf, which needs to be managed either by induced caving of the roof strata or through an increase in width of the excavation. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2016
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