An insight from energy index characterization to determine the proneness of rockburst for hard rock

Du, K; Luo, X; Yang, S; Danial, JA; Zhou, J

An insight from energy index characterization to determine the proneness of rockburst for hard rock

Du, K Luo, X Yang, S Danial, JA Zhou, J

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Geomechanics for Energy and the Environment, 2023, 35, pp. 100478
Issue Date:: 2023-09-01

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Field	Value	Language
dc.contributor.author	Du, K
dc.contributor.author	Luo, X
dc.contributor.author	Yang, S
dc.contributor.author	Danial, JA
dc.contributor.author	Zhou, J
dc.date.accessioned	2024-04-23T01:32:29Z
dc.date.available	2024-04-23T01:32:29Z
dc.date.issued	2023-09-01
dc.identifier.citation	Geomechanics for Energy and the Environment, 2023, 35, pp. 100478
dc.identifier.issn	2352-3808
dc.identifier.issn	2352-3808
dc.identifier.uri	http://hdl.handle.net/10453/178247
dc.description.abstract	The evaluation index and classification criterion of coal bursting liability are often used to evaluate hard rock rockburst proneness. In view of the great difference between the engineering conditions of embedding rocks (hard) and coal seam (softer), the evaluation results of rockburst proneness of hard rock are not accord with the actual situation. Aiming at this problem, rockburst tendency indices were studied by laboratory test in this paper. Based on the analysis of the data, it is concluded that the peak-strength strain energy storage index WETP and residual elastic energy index AEF can reflect the energy and rockburst proneness of hard rock from the elastic energy storage and residual elastic energy. By designing the cyclic loading and unloading test and the uniaxial compression test of rock, the loading rates of the above two kinds of energy indices were determined, and the determination and calculation process of the above two kinds of energy indices were clarified. The experimental results show that the linear elastic energy storage law obtained by cyclic loading and unloading of one sample is not very different from that obtained by multiple samples, both methods can be used for measurement. The peak-strength elastic energy density, pre-peak total input energy density and post-peak failure energy density of rock increase slightly with the strain rate, and the degree of rock fragmentation also has the same trend. The energy index of rock cannot fully reflect the rockburst proneness of rock. Based on the test process and results, in the case of hard rocks, 0.3–1 mm/min could be used for displacement control mode, and 50–140 kN/min should be used for load control mode. Extensometer or instrument sensor can be the strain acquisition methods.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Geomechanics for Energy and the Environment
dc.relation.isbasedon	10.1016/j.gete.2023.100478
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0403 Geology, 0905 Civil Engineering
dc.subject.classification	3705 Geology
dc.subject.classification	4019 Resources engineering and extractive metallurgy
dc.title	An insight from energy index characterization to determine the proneness of rockburst for hard rock
dc.type	Journal Article
utslib.citation.volume	35
utslib.for	0403 Geology
utslib.for	0905 Civil Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2024-04-23T01:32:28Z
pubs.publication-status	Published
pubs.volume	35

Abstract:

The evaluation index and classification criterion of coal bursting liability are often used to evaluate hard rock rockburst proneness. In view of the great difference between the engineering conditions of embedding rocks (hard) and coal seam (softer), the evaluation results of rockburst proneness of hard rock are not accord with the actual situation. Aiming at this problem, rockburst tendency indices were studied by laboratory test in this paper. Based on the analysis of the data, it is concluded that the peak-strength strain energy storage index WETP and residual elastic energy index AEF can reflect the energy and rockburst proneness of hard rock from the elastic energy storage and residual elastic energy. By designing the cyclic loading and unloading test and the uniaxial compression test of rock, the loading rates of the above two kinds of energy indices were determined, and the determination and calculation process of the above two kinds of energy indices were clarified. The experimental results show that the linear elastic energy storage law obtained by cyclic loading and unloading of one sample is not very different from that obtained by multiple samples, both methods can be used for measurement. The peak-strength elastic energy density, pre-peak total input energy density and post-peak failure energy density of rock increase slightly with the strain rate, and the degree of rock fragmentation also has the same trend. The energy index of rock cannot fully reflect the rockburst proneness of rock. Based on the test process and results, in the case of hard rocks, 0.3–1 mm/min could be used for displacement control mode, and 50–140 kN/min should be used for load control mode. Extensometer or instrument sensor can be the strain acquisition methods.

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http://hdl.handle.net/10453/178247