Research on residual strength characteristics of high water materials based on improved H-B criterion.

To develop a new gangue polymer filling material with low compressive ratio, this paper intends to add high water cementing material to the gangue for backfilling. Uniaxial and tri-axial bearing experiments were conducted to study its bearing characteristics and residual strength. Based on Hock-Brow...

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Autores principales:	Lihui Zheng, Yuejin Zhou, Mingpeng Li, Xiaotong Li
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1394925c53de41fbb18f9ef2c54c5c64
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spelling	oai:doaj.org-article:1394925c53de41fbb18f9ef2c54c5c642021-12-02T20:09:55ZResearch on residual strength characteristics of high water materials based on improved H-B criterion.1932-620310.1371/journal.pone.0245018https://doaj.org/article/1394925c53de41fbb18f9ef2c54c5c642021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0245018https://doaj.org/toc/1932-6203To develop a new gangue polymer filling material with low compressive ratio, this paper intends to add high water cementing material to the gangue for backfilling. Uniaxial and tri-axial bearing experiments were conducted to study its bearing characteristics and residual strength. Based on Hock-Brown model theory, it is proposed that friction angle φr can be introduced to substitute model parameter mi, and the degree of cohesion loss can characterize the value of s. So the improved H-B model is established to characterize the residual strength of materials with ductile failure characteristics. The results show that the compressive strength of high water filling material increases linearly corresponding to the rise of confining pressure, and its strength characteristics conform to Mohr-Coulomb strength criterion. The ductile failure characteristics of the sample endow it with high residual strength, which in turn qualifies it for underground filling. After the introduction of cohesion and friction angle, the improved H-B criterion can fit the residual strength curve of the high water filling material more competently. The fitting coefficient of the samples with three water contents is 1.00, 0.99, and 1.00, respectively. The improved H-B model of residual strength demonstrates the change rule of residual strength of the samples corresponding to the change of confining pressure; under tri-axial loading, the angle between fracture surface and axial direction becomes larger as the confining pressure rises; and the failure mode of the material transforms from splitting failure to shear failure.Lihui ZhengYuejin ZhouMingpeng LiXiaotong LiPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 6, p e0245018 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Lihui Zheng Yuejin Zhou Mingpeng Li Xiaotong Li Research on residual strength characteristics of high water materials based on improved H-B criterion.
description	To develop a new gangue polymer filling material with low compressive ratio, this paper intends to add high water cementing material to the gangue for backfilling. Uniaxial and tri-axial bearing experiments were conducted to study its bearing characteristics and residual strength. Based on Hock-Brown model theory, it is proposed that friction angle φr can be introduced to substitute model parameter mi, and the degree of cohesion loss can characterize the value of s. So the improved H-B model is established to characterize the residual strength of materials with ductile failure characteristics. The results show that the compressive strength of high water filling material increases linearly corresponding to the rise of confining pressure, and its strength characteristics conform to Mohr-Coulomb strength criterion. The ductile failure characteristics of the sample endow it with high residual strength, which in turn qualifies it for underground filling. After the introduction of cohesion and friction angle, the improved H-B criterion can fit the residual strength curve of the high water filling material more competently. The fitting coefficient of the samples with three water contents is 1.00, 0.99, and 1.00, respectively. The improved H-B model of residual strength demonstrates the change rule of residual strength of the samples corresponding to the change of confining pressure; under tri-axial loading, the angle between fracture surface and axial direction becomes larger as the confining pressure rises; and the failure mode of the material transforms from splitting failure to shear failure.
format	article
author	Lihui Zheng Yuejin Zhou Mingpeng Li Xiaotong Li
author_facet	Lihui Zheng Yuejin Zhou Mingpeng Li Xiaotong Li
author_sort	Lihui Zheng
title	Research on residual strength characteristics of high water materials based on improved H-B criterion.
title_short	Research on residual strength characteristics of high water materials based on improved H-B criterion.
title_full	Research on residual strength characteristics of high water materials based on improved H-B criterion.
title_fullStr	Research on residual strength characteristics of high water materials based on improved H-B criterion.
title_full_unstemmed	Research on residual strength characteristics of high water materials based on improved H-B criterion.
title_sort	research on residual strength characteristics of high water materials based on improved h-b criterion.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/1394925c53de41fbb18f9ef2c54c5c64
work_keys_str_mv	AT lihuizheng researchonresidualstrengthcharacteristicsofhighwatermaterialsbasedonimprovedhbcriterion AT yuejinzhou researchonresidualstrengthcharacteristicsofhighwatermaterialsbasedonimprovedhbcriterion AT mingpengli researchonresidualstrengthcharacteristicsofhighwatermaterialsbasedonimprovedhbcriterion AT xiaotongli researchonresidualstrengthcharacteristicsofhighwatermaterialsbasedonimprovedhbcriterion
_version_	1718375046732316672

Research on residual strength characteristics of high water materials based on improved H-B criterion.

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