Experimental Study on Crack Propagation of Rock by Blasting under Bidirectional Equal Confining Pressure Load

Rock blasting during tunneling has shown that the rock failure in high in situ stress environments is different from that in low in situ stress conditions or with a shallow rock mass. In particular, the propagation direction of the main crack induced by blasting is greatly affected by the in situ st...

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Autores principales:	Jinjin Ge, Ying Xu, Wei Huang, Haibo Wang, Rongzhou Yang, Zhongyi Zhang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	in situ stress rock blasting crack propagation model test Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/c3e31d02f8a2432cb90bfc764e50e544
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spelling	oai:doaj.org-article:c3e31d02f8a2432cb90bfc764e50e5442021-11-11T19:43:59ZExperimental Study on Crack Propagation of Rock by Blasting under Bidirectional Equal Confining Pressure Load10.3390/su1321120932071-1050https://doaj.org/article/c3e31d02f8a2432cb90bfc764e50e5442021-11-01T00:00:00Zhttps://www.mdpi.com/2071-1050/13/21/12093https://doaj.org/toc/2071-1050Rock blasting during tunneling has shown that the rock failure in high in situ stress environments is different from that in low in situ stress conditions or with a shallow rock mass. In particular, the propagation direction of the main crack induced by blasting is greatly affected by the in situ stresses. In order to study the law of crack propagation in rock during blasting under the conditions of an initial in situ stress, a transparent material that conformed to the mechanical properties of hard rock was used to carry out a similar model rock blasting test, under a unidirectional load. The results show that initial stress has a great influence on the propagation number, length, and direction of the main radial cracks. The specific performances were as follows: under the action of an equal confining pressure load, the longest main radial crack in the model specimen propagated along the diagonal direction, and the number and length of the main radial cracks propagated decreased with the gradual increase of confining pressure stress; in addition, the diameter of the circumferential cracks also decreased with the increase of stress, and there was a negative correlation between them. In view of the phenomenon where the longest main radial crack propagated along the diagonal direction in the model test, a mechanical model was established in this study to explain this process. This is of practical significance for understanding the mechanism of rock fracture when blasting with high in situ stresses.Jinjin GeYing XuWei HuangHaibo WangRongzhou YangZhongyi ZhangMDPI AGarticlein situ stressrock blastingcrack propagationmodel testEnvironmental effects of industries and plantsTD194-195Renewable energy sourcesTJ807-830Environmental sciencesGE1-350ENSustainability, Vol 13, Iss 12093, p 12093 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	in situ stress rock blasting crack propagation model test Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
spellingShingle	in situ stress rock blasting crack propagation model test Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350 Jinjin Ge Ying Xu Wei Huang Haibo Wang Rongzhou Yang Zhongyi Zhang Experimental Study on Crack Propagation of Rock by Blasting under Bidirectional Equal Confining Pressure Load
description	Rock blasting during tunneling has shown that the rock failure in high in situ stress environments is different from that in low in situ stress conditions or with a shallow rock mass. In particular, the propagation direction of the main crack induced by blasting is greatly affected by the in situ stresses. In order to study the law of crack propagation in rock during blasting under the conditions of an initial in situ stress, a transparent material that conformed to the mechanical properties of hard rock was used to carry out a similar model rock blasting test, under a unidirectional load. The results show that initial stress has a great influence on the propagation number, length, and direction of the main radial cracks. The specific performances were as follows: under the action of an equal confining pressure load, the longest main radial crack in the model specimen propagated along the diagonal direction, and the number and length of the main radial cracks propagated decreased with the gradual increase of confining pressure stress; in addition, the diameter of the circumferential cracks also decreased with the increase of stress, and there was a negative correlation between them. In view of the phenomenon where the longest main radial crack propagated along the diagonal direction in the model test, a mechanical model was established in this study to explain this process. This is of practical significance for understanding the mechanism of rock fracture when blasting with high in situ stresses.
format	article
author	Jinjin Ge Ying Xu Wei Huang Haibo Wang Rongzhou Yang Zhongyi Zhang
author_facet	Jinjin Ge Ying Xu Wei Huang Haibo Wang Rongzhou Yang Zhongyi Zhang
author_sort	Jinjin Ge
title	Experimental Study on Crack Propagation of Rock by Blasting under Bidirectional Equal Confining Pressure Load
title_short	Experimental Study on Crack Propagation of Rock by Blasting under Bidirectional Equal Confining Pressure Load
title_full	Experimental Study on Crack Propagation of Rock by Blasting under Bidirectional Equal Confining Pressure Load
title_fullStr	Experimental Study on Crack Propagation of Rock by Blasting under Bidirectional Equal Confining Pressure Load
title_full_unstemmed	Experimental Study on Crack Propagation of Rock by Blasting under Bidirectional Equal Confining Pressure Load
title_sort	experimental study on crack propagation of rock by blasting under bidirectional equal confining pressure load
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c3e31d02f8a2432cb90bfc764e50e544
work_keys_str_mv	AT jinjinge experimentalstudyoncrackpropagationofrockbyblastingunderbidirectionalequalconfiningpressureload AT yingxu experimentalstudyoncrackpropagationofrockbyblastingunderbidirectionalequalconfiningpressureload AT weihuang experimentalstudyoncrackpropagationofrockbyblastingunderbidirectionalequalconfiningpressureload AT haibowang experimentalstudyoncrackpropagationofrockbyblastingunderbidirectionalequalconfiningpressureload AT rongzhouyang experimentalstudyoncrackpropagationofrockbyblastingunderbidirectionalequalconfiningpressureload AT zhongyizhang experimentalstudyoncrackpropagationofrockbyblastingunderbidirectionalequalconfiningpressureload
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Experimental Study on Crack Propagation of Rock by Blasting under Bidirectional Equal Confining Pressure Load

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