Experimental Study of Gangue Layer Weakening with Deep-Hole Presplitting Blasting

Advances in coal mining technology and an increase in coal output are resulting in increasingly challenging conditions being encountered at coal seams. This is particularly so at thin coal seams, where a large number of hard rock layers known as gangue are often present, which seriously affect the n...

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Autores principales:	Jianchi Hao, Lifeng Ren, Hu Wen, Duo Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/8816dd2272e1472e9cb01b31c12b5096
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spelling	oai:doaj.org-article:8816dd2272e1472e9cb01b31c12b50962021-11-22T01:10:57ZExperimental Study of Gangue Layer Weakening with Deep-Hole Presplitting Blasting1875-920310.1155/2021/4796500https://doaj.org/article/8816dd2272e1472e9cb01b31c12b50962021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/4796500https://doaj.org/toc/1875-9203Advances in coal mining technology and an increase in coal output are resulting in increasingly challenging conditions being encountered at coal seams. This is particularly so at thin coal seams, where a large number of hard rock layers known as gangue are often present, which seriously affect the normal operation of the shearer and reduce coal output. Therefore, the effective weakening of hard gangue layers in a coal seam is crucial to ensure that the shearer operates effectively and that coal output is maximized. In this paper, the weakening effect of deep-hole presplitting blasting technology on the hard gangue layer in a coal seam is studied via a similar simulation. Four test schemes are designed: (1) A blasting hole spacing of 200 mm with the holes offset vertically. (2) A blast hole spacing of 300 mm with the holes offset vertically. (3) A blast hole spacing of 200 mm with the holes parallel to the gangue layer. (4) A blasting hole spacing of 200 mm with the holes offset vertically and initiation of interval blasting. The effect of the different blasting hole spacings and arrangements and different detonation methods on the weakening of coal seam clamping by gangue is studied, and the best configuration is identified. This improves the effect of weakening the coal gangue layer by deep-hole presplitting blasting.Jianchi HaoLifeng RenHu WenDuo ZhangHindawi LimitedarticlePhysicsQC1-999ENShock and Vibration, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Jianchi Hao Lifeng Ren Hu Wen Duo Zhang Experimental Study of Gangue Layer Weakening with Deep-Hole Presplitting Blasting
description	Advances in coal mining technology and an increase in coal output are resulting in increasingly challenging conditions being encountered at coal seams. This is particularly so at thin coal seams, where a large number of hard rock layers known as gangue are often present, which seriously affect the normal operation of the shearer and reduce coal output. Therefore, the effective weakening of hard gangue layers in a coal seam is crucial to ensure that the shearer operates effectively and that coal output is maximized. In this paper, the weakening effect of deep-hole presplitting blasting technology on the hard gangue layer in a coal seam is studied via a similar simulation. Four test schemes are designed: (1) A blasting hole spacing of 200 mm with the holes offset vertically. (2) A blast hole spacing of 300 mm with the holes offset vertically. (3) A blast hole spacing of 200 mm with the holes parallel to the gangue layer. (4) A blasting hole spacing of 200 mm with the holes offset vertically and initiation of interval blasting. The effect of the different blasting hole spacings and arrangements and different detonation methods on the weakening of coal seam clamping by gangue is studied, and the best configuration is identified. This improves the effect of weakening the coal gangue layer by deep-hole presplitting blasting.
format	article
author	Jianchi Hao Lifeng Ren Hu Wen Duo Zhang
author_facet	Jianchi Hao Lifeng Ren Hu Wen Duo Zhang
author_sort	Jianchi Hao
title	Experimental Study of Gangue Layer Weakening with Deep-Hole Presplitting Blasting
title_short	Experimental Study of Gangue Layer Weakening with Deep-Hole Presplitting Blasting
title_full	Experimental Study of Gangue Layer Weakening with Deep-Hole Presplitting Blasting
title_fullStr	Experimental Study of Gangue Layer Weakening with Deep-Hole Presplitting Blasting
title_full_unstemmed	Experimental Study of Gangue Layer Weakening with Deep-Hole Presplitting Blasting
title_sort	experimental study of gangue layer weakening with deep-hole presplitting blasting
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/8816dd2272e1472e9cb01b31c12b5096
work_keys_str_mv	AT jianchihao experimentalstudyofganguelayerweakeningwithdeepholepresplittingblasting AT lifengren experimentalstudyofganguelayerweakeningwithdeepholepresplittingblasting AT huwen experimentalstudyofganguelayerweakeningwithdeepholepresplittingblasting AT duozhang experimentalstudyofganguelayerweakeningwithdeepholepresplittingblasting
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Experimental Study of Gangue Layer Weakening with Deep-Hole Presplitting Blasting

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