Influence of rock’s structure at grain-scale on rockburst proneness

Abstract As projects advance to deeper areas, rockbursts occur more frequently. This failure mode is particularly problematic, as the rock mass fails abruptly, releasing high amounts of energy, endangering the life of workers and damaging equipment. The hazard mode is highly influenced by the grain-...

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Bibliographic Details
Published inIOP conference series. Earth and environmental science Vol. 833; no. 1; pp. 12124 - 12133
Main Authors Klammer, A, Gottsbacher, L, Biermann, J, Zobl, F, Marschallinger, R, Hofmann, P, Marcher, T, Schubert, W
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.08.2021
Subjects
Acoustic emission
Acoustic emission testing
Compression
Compression tests
Emission analysis
Failure mechanisms
Failure modes
Image analysis
Image processing
Risk analysis
Rock masses
Rockbursts
Rocks
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Summary:Abstract As projects advance to deeper areas, rockbursts occur more frequently. This failure mode is particularly problematic, as the rock mass fails abruptly, releasing high amounts of energy, endangering the life of workers and damaging equipment. The hazard mode is highly influenced by the grain-level structure of the rock. The authors demonstrate this by comparing the grain-level structure of different rocks to their failure mechanism. For this an extensive laboratory program was performed, including uniaxial compression tests (incl. post-failure tests to evaluate the failure energy), acoustic emission testing (to monitor the cracking activity) and Object Based Image Analysis (OBIA) to analyze rock’s structure at grain scale using thin sections taken before and after the compression test. The results allow a better understanding of the underlying mechanism and emphasize the usefulness of petrographic information within rockburst risk analysis.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/833/1/012124