Dynamic model of fault slip and its effect on coal bursts in deep mines
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68145535%3A_____%2F21%3A00548176" target="_blank" >RIV/68145535:_____/21:00548176 - isvavai.cz</a>
Result on the web
<a href="https://ro.uow.edu.au/coal/808/" target="_blank" >https://ro.uow.edu.au/coal/808/</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Dynamic model of fault slip and its effect on coal bursts in deep mines
Original language description
The success of deep mining operations relies upon controlling the fractured ground. It is a documented knowledge that many coal bursts occur when mining close to the existing faults. Gradual stress relief towards excavations and other mechanisms can unload stress normal to the nearby fault plane causing it to slip. The generated seismic waves impact the mine roadway rib sides and can produce a coal burst. As part of the ACARP project, the FLAC3D dynamic numerical model was used to show how a fault slip at various locations and orientations may initiate a coal burst. This study simulates an artificial fault slip with peak velocity reaching 4m/s in 0.013 seconds and displacing 119mm in total. Seismic induced peak particle velocities in rock and its influence on coal rib stability were investigated. 89 numerical models with various fault locations and orientations at 450m depth indicated that a 4 tonne coal block can be ejected from the mine roadway rib side at speeds of up to 5m/s. The important finding is that irrespective of the fault slip magnitude, the fault geometry and the in-situ stresses enable to predict which side of the mine roadway may experience the coal burst. Instructing the mine personnel to use the other side of the roadway may improve their safety. Overall, this research produced preliminary results to prove that this method can be used to flag the coal burst dangers for certain fault locations and orientations in deeper mines irrespective of the fault slip properties that are typically difficult to predict.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20703 - Mining and mineral processing
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of the 2021 Resource Operators Conference
ISBN
978-1-74128-335-8
ISSN
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e-ISSN
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Number of pages
8
Pages from-to
186-193
Publisher name
University of Southern Queensland
Place of publication
Toowoomba, Queensland
Event location
University of Southern Queensland
Event date
Feb 10, 2021
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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