Research on Pressure Relief Hole Parameters Based on Abutment Pressure Distribution Pattern

Borehole pressure relief technology is an effective way to reduce the elastic energy in the surrounding rock of deep roadways, thereby reducing the risk of regional rock bursts. To avoid large deformation of the roadway caused by pressure relief holes with large diameters and insufficient pressure r...

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Autores principales:	Jian Hao, Hua Bian, Yongkui Shi, Anfa Chen, Jiankang Liu, Peizhe Zhang, Linjun Peng, Jianquan Tang
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/02e9928ed6c34ed1afbf737a1cbf1028
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spelling	oai:doaj.org-article:02e9928ed6c34ed1afbf737a1cbf10282021-11-08T02:37:05ZResearch on Pressure Relief Hole Parameters Based on Abutment Pressure Distribution Pattern1875-920310.1155/2021/7143590https://doaj.org/article/02e9928ed6c34ed1afbf737a1cbf10282021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/7143590https://doaj.org/toc/1875-9203Borehole pressure relief technology is an effective way to reduce the elastic energy in the surrounding rock of deep roadways, thereby reducing the risk of regional rock bursts. To avoid large deformation of the roadway caused by pressure relief holes with large diameters and insufficient pressure relief with small pore diameters, this study proposes precise pressure relief holes with nonequal diameters in order to achieve strong pressure relief with minimal disturbance based on the abutment pressure distribution pattern. To verify the pressure relief effect of the nonequal diameter holes, numerical simulations were performed in FLAC3D. This study investigated stress field, deformation laws, and plastic failure zone of roadway surrounding rock with 100 mm pressure relief holes, nonequal diameter precision pressure relief hole (100 mm + 300 mm), and 300 mm pressure relief holes. The simulation results show that, as the diameter of the pressure relief hole increases, the coupling effect of evenly spaced adjacent pressure relief holes is strengthened, thus improving the pressure relief efficiency. When pressure relief holes of nonequal diameter are adopted, the stress environment of the surrounding rock is clearly improved compared to100 mm pressure relief holes, and the plastic failure range increased by 2-3 times. The roof-to-floor convergence with nonequal diameter is 30.8% that of 300 mm pressure relief holes and 41% that of 100 mm pressure relief holes. Furthermore, the rib displacement is 30.4% and 46.9% that of 300 mm and 100 mm pressure relief holes, respectively. Thus, precise pressure relief holes with nonequal diameter provide both strong pressure relief associated with large diameter holes and small disturbance of small diameter of small holes. This study provides a reference for precise pressure relief application with pressure relief holes.Jian HaoHua BianYongkui ShiAnfa ChenJiankang LiuPeizhe ZhangLinjun PengJianquan TangHindawi LimitedarticlePhysicsQC1-999ENShock and Vibration, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Jian Hao Hua Bian Yongkui Shi Anfa Chen Jiankang Liu Peizhe Zhang Linjun Peng Jianquan Tang Research on Pressure Relief Hole Parameters Based on Abutment Pressure Distribution Pattern
description	Borehole pressure relief technology is an effective way to reduce the elastic energy in the surrounding rock of deep roadways, thereby reducing the risk of regional rock bursts. To avoid large deformation of the roadway caused by pressure relief holes with large diameters and insufficient pressure relief with small pore diameters, this study proposes precise pressure relief holes with nonequal diameters in order to achieve strong pressure relief with minimal disturbance based on the abutment pressure distribution pattern. To verify the pressure relief effect of the nonequal diameter holes, numerical simulations were performed in FLAC3D. This study investigated stress field, deformation laws, and plastic failure zone of roadway surrounding rock with 100 mm pressure relief holes, nonequal diameter precision pressure relief hole (100 mm + 300 mm), and 300 mm pressure relief holes. The simulation results show that, as the diameter of the pressure relief hole increases, the coupling effect of evenly spaced adjacent pressure relief holes is strengthened, thus improving the pressure relief efficiency. When pressure relief holes of nonequal diameter are adopted, the stress environment of the surrounding rock is clearly improved compared to100 mm pressure relief holes, and the plastic failure range increased by 2-3 times. The roof-to-floor convergence with nonequal diameter is 30.8% that of 300 mm pressure relief holes and 41% that of 100 mm pressure relief holes. Furthermore, the rib displacement is 30.4% and 46.9% that of 300 mm and 100 mm pressure relief holes, respectively. Thus, precise pressure relief holes with nonequal diameter provide both strong pressure relief associated with large diameter holes and small disturbance of small diameter of small holes. This study provides a reference for precise pressure relief application with pressure relief holes.
format	article
author	Jian Hao Hua Bian Yongkui Shi Anfa Chen Jiankang Liu Peizhe Zhang Linjun Peng Jianquan Tang
author_facet	Jian Hao Hua Bian Yongkui Shi Anfa Chen Jiankang Liu Peizhe Zhang Linjun Peng Jianquan Tang
author_sort	Jian Hao
title	Research on Pressure Relief Hole Parameters Based on Abutment Pressure Distribution Pattern
title_short	Research on Pressure Relief Hole Parameters Based on Abutment Pressure Distribution Pattern
title_full	Research on Pressure Relief Hole Parameters Based on Abutment Pressure Distribution Pattern
title_fullStr	Research on Pressure Relief Hole Parameters Based on Abutment Pressure Distribution Pattern
title_full_unstemmed	Research on Pressure Relief Hole Parameters Based on Abutment Pressure Distribution Pattern
title_sort	research on pressure relief hole parameters based on abutment pressure distribution pattern
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/02e9928ed6c34ed1afbf737a1cbf1028
work_keys_str_mv	AT jianhao researchonpressurereliefholeparametersbasedonabutmentpressuredistributionpattern AT huabian researchonpressurereliefholeparametersbasedonabutmentpressuredistributionpattern AT yongkuishi researchonpressurereliefholeparametersbasedonabutmentpressuredistributionpattern AT anfachen researchonpressurereliefholeparametersbasedonabutmentpressuredistributionpattern AT jiankangliu researchonpressurereliefholeparametersbasedonabutmentpressuredistributionpattern AT peizhezhang researchonpressurereliefholeparametersbasedonabutmentpressuredistributionpattern AT linjunpeng researchonpressurereliefholeparametersbasedonabutmentpressuredistributionpattern AT jianquantang researchonpressurereliefholeparametersbasedonabutmentpressuredistributionpattern
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Research on Pressure Relief Hole Parameters Based on Abutment Pressure Distribution Pattern

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