The Effect of Joint Damage on a Coal Wall and the Influence of Joints on the Abutment Pressure on a Fully Mechanised Working Face with Large Mining Height

Coal wall spalling is regarded as a key technical problem influencing safe and efficient mining of large-mining-height working faces while the distribution of abutment pressure within the limit equilibrium zone (LEZ) influences coal wall spalling within a large-mining-height working face. This resea...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Weibin Guo, Shengwei Zhang, Yuhui Li
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/cf0182b46a5b4d78b73bdd0d3ff554b8
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:cf0182b46a5b4d78b73bdd0d3ff554b8
record_format	dspace
spelling	oai:doaj.org-article:cf0182b46a5b4d78b73bdd0d3ff554b82021-11-22T01:10:06ZThe Effect of Joint Damage on a Coal Wall and the Influence of Joints on the Abutment Pressure on a Fully Mechanised Working Face with Large Mining Height1875-920310.1155/2021/9963175https://doaj.org/article/cf0182b46a5b4d78b73bdd0d3ff554b82021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/9963175https://doaj.org/toc/1875-9203Coal wall spalling is regarded as a key technical problem influencing safe and efficient mining of large-mining-height working faces while the distribution of abutment pressure within the limit equilibrium zone (LEZ) influences coal wall spalling within a large-mining-height working face. This research attempted to explore the distribution characteristics of abutment pressure within the LEZ in a large-mining-height working face. For this purpose, the influences of the orientation of joints on mechanical characteristics of coal with joints and on the distribution of abutment pressure within the LEZ in the large-mining-height working face were analysed by theoretical analysis and numerical simulation. Research results show that the damage variable of coal with joints first rises, then decreases, and finally increases with increasing dip angle of the joints; as the azimuth of the joints increases, the damage variable first declines, then increases; the damage variable gradually declines with increasing joint spacing; an increase in the dip angle of joints corresponds to first reduction, then growth, and a final decrease of the abutment pressure at the same position in front of the coal walls; on certain conditions, the abutment pressure at the same position within the LEZ first rises, then declines as the azimuth of joints increases; with the growth of the joint spacing, the abutment pressure at the same position within the LEZ rises. The dip angle and azimuth of joints marginally affect the abutment pressure within the LEZ.Weibin GuoShengwei ZhangYuhui LiHindawi LimitedarticlePhysicsQC1-999ENShock and Vibration, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Weibin Guo Shengwei Zhang Yuhui Li The Effect of Joint Damage on a Coal Wall and the Influence of Joints on the Abutment Pressure on a Fully Mechanised Working Face with Large Mining Height
description	Coal wall spalling is regarded as a key technical problem influencing safe and efficient mining of large-mining-height working faces while the distribution of abutment pressure within the limit equilibrium zone (LEZ) influences coal wall spalling within a large-mining-height working face. This research attempted to explore the distribution characteristics of abutment pressure within the LEZ in a large-mining-height working face. For this purpose, the influences of the orientation of joints on mechanical characteristics of coal with joints and on the distribution of abutment pressure within the LEZ in the large-mining-height working face were analysed by theoretical analysis and numerical simulation. Research results show that the damage variable of coal with joints first rises, then decreases, and finally increases with increasing dip angle of the joints; as the azimuth of the joints increases, the damage variable first declines, then increases; the damage variable gradually declines with increasing joint spacing; an increase in the dip angle of joints corresponds to first reduction, then growth, and a final decrease of the abutment pressure at the same position in front of the coal walls; on certain conditions, the abutment pressure at the same position within the LEZ first rises, then declines as the azimuth of joints increases; with the growth of the joint spacing, the abutment pressure at the same position within the LEZ rises. The dip angle and azimuth of joints marginally affect the abutment pressure within the LEZ.
format	article
author	Weibin Guo Shengwei Zhang Yuhui Li
author_facet	Weibin Guo Shengwei Zhang Yuhui Li
author_sort	Weibin Guo
title	The Effect of Joint Damage on a Coal Wall and the Influence of Joints on the Abutment Pressure on a Fully Mechanised Working Face with Large Mining Height
title_short	The Effect of Joint Damage on a Coal Wall and the Influence of Joints on the Abutment Pressure on a Fully Mechanised Working Face with Large Mining Height
title_full	The Effect of Joint Damage on a Coal Wall and the Influence of Joints on the Abutment Pressure on a Fully Mechanised Working Face with Large Mining Height
title_fullStr	The Effect of Joint Damage on a Coal Wall and the Influence of Joints on the Abutment Pressure on a Fully Mechanised Working Face with Large Mining Height
title_full_unstemmed	The Effect of Joint Damage on a Coal Wall and the Influence of Joints on the Abutment Pressure on a Fully Mechanised Working Face with Large Mining Height
title_sort	effect of joint damage on a coal wall and the influence of joints on the abutment pressure on a fully mechanised working face with large mining height
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/cf0182b46a5b4d78b73bdd0d3ff554b8
work_keys_str_mv	AT weibinguo theeffectofjointdamageonacoalwallandtheinfluenceofjointsontheabutmentpressureonafullymechanisedworkingfacewithlargeminingheight AT shengweizhang theeffectofjointdamageonacoalwallandtheinfluenceofjointsontheabutmentpressureonafullymechanisedworkingfacewithlargeminingheight AT yuhuili theeffectofjointdamageonacoalwallandtheinfluenceofjointsontheabutmentpressureonafullymechanisedworkingfacewithlargeminingheight AT weibinguo effectofjointdamageonacoalwallandtheinfluenceofjointsontheabutmentpressureonafullymechanisedworkingfacewithlargeminingheight AT shengweizhang effectofjointdamageonacoalwallandtheinfluenceofjointsontheabutmentpressureonafullymechanisedworkingfacewithlargeminingheight AT yuhuili effectofjointdamageonacoalwallandtheinfluenceofjointsontheabutmentpressureonafullymechanisedworkingfacewithlargeminingheight
_version_	1718418427263057920

The Effect of Joint Damage on a Coal Wall and the Influence of Joints on the Abutment Pressure on a Fully Mechanised Working Face with Large Mining Height

Ejemplares similares