Dynamic analysis of fault slips and their influence on coal mine rib stability

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68145535%3A_____%2F20%3A00532514" target="_blank" >RIV/68145535:_____/20:00532514 - isvavai.cz</a>

Result on the web

<a href="https://ro.uow.edu.au/coal/" target="_blank" >https://ro.uow.edu.au/coal/</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Dynamic analysis of fault slips and their influence on coal mine rib stability

Original language description

Historical data indicate that in deep coal mines the presence of faults in close proximity to excavations affect the frequency of coal bursts. A number of researchers havenattempted to correlate the fault geometries to the frequency and severity of coal bursts but dynamic numerical modelling has not been used to show how faults can affect coal ejectionnfrom the rib side. The dynamic numerical analysis presented here show how different orientations of fault slips may affect coal bursts. To prove the concept, 89 cases of slipping faultngeometries were modelled using the FLAC3D software and their effect on rib stability investigated. The results indicate that there is a simple and logical correlation between the faultnlocation, its slip velocity and the ejection of the yielded coal rib side. The seismic compressive wave generates rock/coal mass velocities that directly impact the rib side. If the coal rib isnrelatively disturbed and loose, these velocities can cause its ejection into the excavation. The slip direction typically impacts one side of the mine roadway only. A 1 m thick loose coal blocknattached to the 3 m high rib side in mine roadway was ejected at speeds ranging from 2.5 to 5 m/s depending on the fault location, its orientation and the maximum fault slip velocity modelled at 4 m/s.n

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20703 - Mining and mineral processing

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of the 2020 Coal Operators Conference

ISBN

978-1-74128-320-4

ISSN

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e-ISSN

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Number of pages

11

Pages from-to

264-274

Publisher name

University of Wollongong - Mining Engineering

Place of publication

Wollongong

Event location

University of Wollongong

Event date

Feb 12, 2020

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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