Study on Damage Constitutive Model of High-Concentration Cemented Backfill in Coal Mine

In order to construct the damage constitutive model (DCM) of high-concentration cemented backfill (HCCB) in coal mine, the generalized Hoek-Brown strength criterion was used as the failure criterion. For the difference of theoretical derivation of constitutive relation, a new DCM based on residual s...

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Autores principales:	Baogui Yang, Haigang Yang
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi-Wiley 2021
Materias:	Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/c987f3f57f7a43d4915ba295eb44091f
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spelling	oai:doaj.org-article:c987f3f57f7a43d4915ba295eb44091f2021-11-08T02:36:08ZStudy on Damage Constitutive Model of High-Concentration Cemented Backfill in Coal Mine1468-812310.1155/2021/1866042https://doaj.org/article/c987f3f57f7a43d4915ba295eb44091f2021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/1866042https://doaj.org/toc/1468-8123In order to construct the damage constitutive model (DCM) of high-concentration cemented backfill (HCCB) in coal mine, the generalized Hoek-Brown strength criterion was used as the failure criterion. For the difference of theoretical derivation of constitutive relation, a new DCM based on residual strength was proposed. Combined with the conventional triaxial compression test, the correctness and rationality of the DCM were verified. The damage evolution characteristics of HCCB were analyzed, and the physical meaning of model parameters was clarified. The results show that (a) the theoretical curves of stress-strain relation are in good agreement with its experimental curves, which means DCM can simulate the deformation and failure process of HCCB. (b) The damage evolution curve of HCCB is S-shaped. To some extent, the confining pressure can inhibit the development of damage. (c) The parameter F0 reflects the position of the peak point of the DCM, and parameter n is the slope of the straight line segment in the postpeak strain softening stage, which are, respectively, used to characterize the strength level and brittleness of HCCB. The establishment of DCM of HCCB is helpful to reveal its deformation and failure mechanism and provides theoretical basis for its strength design.Baogui YangHaigang YangHindawi-WileyarticleGeologyQE1-996.5ENGeofluids, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geology QE1-996.5
spellingShingle	Geology QE1-996.5 Baogui Yang Haigang Yang Study on Damage Constitutive Model of High-Concentration Cemented Backfill in Coal Mine
description	In order to construct the damage constitutive model (DCM) of high-concentration cemented backfill (HCCB) in coal mine, the generalized Hoek-Brown strength criterion was used as the failure criterion. For the difference of theoretical derivation of constitutive relation, a new DCM based on residual strength was proposed. Combined with the conventional triaxial compression test, the correctness and rationality of the DCM were verified. The damage evolution characteristics of HCCB were analyzed, and the physical meaning of model parameters was clarified. The results show that (a) the theoretical curves of stress-strain relation are in good agreement with its experimental curves, which means DCM can simulate the deformation and failure process of HCCB. (b) The damage evolution curve of HCCB is S-shaped. To some extent, the confining pressure can inhibit the development of damage. (c) The parameter F0 reflects the position of the peak point of the DCM, and parameter n is the slope of the straight line segment in the postpeak strain softening stage, which are, respectively, used to characterize the strength level and brittleness of HCCB. The establishment of DCM of HCCB is helpful to reveal its deformation and failure mechanism and provides theoretical basis for its strength design.
format	article
author	Baogui Yang Haigang Yang
author_facet	Baogui Yang Haigang Yang
author_sort	Baogui Yang
title	Study on Damage Constitutive Model of High-Concentration Cemented Backfill in Coal Mine
title_short	Study on Damage Constitutive Model of High-Concentration Cemented Backfill in Coal Mine
title_full	Study on Damage Constitutive Model of High-Concentration Cemented Backfill in Coal Mine
title_fullStr	Study on Damage Constitutive Model of High-Concentration Cemented Backfill in Coal Mine
title_full_unstemmed	Study on Damage Constitutive Model of High-Concentration Cemented Backfill in Coal Mine
title_sort	study on damage constitutive model of high-concentration cemented backfill in coal mine
publisher	Hindawi-Wiley
publishDate	2021
url	https://doaj.org/article/c987f3f57f7a43d4915ba295eb44091f
work_keys_str_mv	AT baoguiyang studyondamageconstitutivemodelofhighconcentrationcementedbackfillincoalmine AT haigangyang studyondamageconstitutivemodelofhighconcentrationcementedbackfillincoalmine
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Study on Damage Constitutive Model of High-Concentration Cemented Backfill in Coal Mine

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