Open AccessInfluence of rock’s structure at grain-scale on rockburst proneness
Author(s) -
Angelika Klammer,
Lukas Gottsbacher,
Joshua Biermann,
Fritz Zobl,
Robert Marschallinger,
Peter Hofmann,
Thomas Marcher,
Wulf Schubert
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/833/1/012124
Subject(s) - petrography , failure mechanism , failure mode and effects analysis , geology , geotechnical engineering , scale (ratio) , acoustic emission , hazard , cracking , rock mass classification , grain size , forensic engineering , mining engineering , mineralogy , engineering , materials science , structural engineering , geomorphology , geography , cartography , composite material , chemistry , organic chemistry
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.