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Stress changes and seismicity monitoring of hard coal longwall mining in high rockburst risk areas
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SYSNO ASEP 0491714 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Stress changes and seismicity monitoring of hard coal longwall mining in high rockburst risk areas Author(s) Koníček, Petr (UGN-S) RID, ORCID
Waclawik, Petr (UGN-S) RIDNumber of authors 2 Source Title Tunnelling and Underground Space Technology. - : Elsevier - ISSN 0886-7798
Roč. 81, č. 81 (2018), s. 237-251Number of pages 15 s. Publication form Online - E Language eng - English Country GB - United Kingdom Keywords stress changes ; seismicity ; rockburst ; rockburst prevention Subject RIV DH - Mining, incl. Coal Mining OECD category Civil engineering R&D Projects LO1406 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) VG20102014034 GA MV - Ministry of Interior (MV) Institutional support UGN-S - RVO:68145535 UT WOS 000446949500021 DOI 10.1016/j.tust.2018.07.019 Annotation Rockburst represents a very dangerous phenomenon in deep underground mining as well as in underground constructions in unfavourable conditions (great depth, high horizontal stress, proximity of important tectonic structures, etc.). The rockburst problem relates to the natural and mining conditions of the rock mass. It is very difficult to decide which of the factors prevails, but we generally assume that it is the occurrence of competent rock layers in the rock mass. The destress blasting method is a very important rockburst control technique aims to competent rocks. The case study describes the control of rockburst risk by destress blasting in an example of a longwall of the Upper Silesian Coal Basin. Monitoring of stress changes and induced seismicity was implemented in the selected longwall here and a description of these techniques is given. The paper describes the natural, geomechanical, and mining conditions of the investigated locality in detail. Stress changes ahead of the advancing longwall face as well as registered induced seismicity depending on the longwall advance are analysed, including the application of the destress blasting technique. Stress release efficiency, as one goal of the destress blasting technique, is analysed according to the registered seismicity using the authors’ own methodology: seismic effect calculation. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2019 Electronic address https://www.sciencedirect.com/science/article/pii/S0886779817308763
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