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Destress rock blasting as a rockburst control technique
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SYSNO ASEP 0367791 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Destress rock blasting as a rockburst control technique Author(s) Koníček, Petr (UGN-S) RID, ORCID
Konečný, Petr (UGN-S)
Ptáček, Jiří (UGN-S) RIDNumber of authors 3 Source Title Harmonising Rock Engineering and the Environment. - London : CRC Press Taylor and Francis Group, Balkema, 2011 / Qian Q. ; Zhou Y. - ISBN 978-0-415-80444-8 Pages s. 1-6 Number of pages 6 s. Publication form CD-ROM - CD-ROM Action International Congress on Rock Mechanics/12./ Event date 18.10.2011-21.10.2011 VEvent location Beijing Country CN - China Event type WRD Language eng - English Country GB - United Kingdom Keywords underground coal mining ; rock burst ; destress rock blasting Subject RIV DH - Mining, incl. Coal Mining CEZ AV0Z30860518 - UGN-S (2005-2011) UT WOS 000392521000219 Annotation Rockburst is a very dangerous phenomenon in mining. Destress blasting is one of the active methods of rockburst control. The effect of destress blasting is manifested in two ways: (i) it relieves stress in the forefield of the longwall face due to failure of the coal seam immediately ahead of the face and thus moves the surcharge zone further ahead of the face (preconditioning); and (ii) it influences the mechanical properties of adjacent rocks (softening the rock, reducing its effective elastic modulus, etc.). Due to these measures the high stress concentrations in coal seams (or accompanying rocks) can be reduced. The method of destress blasting is well known from ore mines where it was first used (deep South African gold mines in the 1950s). Application of this method is not yet widespread in hard coal mining. The experience of using the destress blasting technique in coal mines is presented in this paper, namely in difficult natural and mining conditions of multiseam hardcoal deposit (the Czech part of the Upper Silesian Coal Basin). Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2012
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