Application of the Ultimate Hanging Arch Length of the Layered Roof with Anchors and the Gob-Side Entry Retaining

The gob-side entry retaining plays an important role in improving working face ventilation, alleviating working face connection, and increasing mining revenue. According to the characteristics of the crossheading roof at the 2103 working face of a mine in Shanxi, a structural mechanics model of the...

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Autores principales:	Peng Li, Xigui Zheng, Xiaowei Guo, Boyang Li, Cong Wang
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/55b645685eb1473d88f57a36be42c317
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spelling	oai:doaj.org-article:55b645685eb1473d88f57a36be42c3172021-11-15T01:19:09ZApplication of the Ultimate Hanging Arch Length of the Layered Roof with Anchors and the Gob-Side Entry Retaining1875-920310.1155/2021/4338686https://doaj.org/article/55b645685eb1473d88f57a36be42c3172021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/4338686https://doaj.org/toc/1875-9203The gob-side entry retaining plays an important role in improving working face ventilation, alleviating working face connection, and increasing mining revenue. According to the characteristics of the crossheading roof at the 2103 working face of a mine in Shanxi, a structural mechanics model of the roof was established to derive the theoretical formulae for the ultimate hanging arch length of the layered roof with anchors and the initial support resistance of the entry-side support. The influence factors of the ultimate hanging arch length were evaluated using local sensitivity analysis. Based on the theoretical study, the work proposed the collaborative support technology of the crossheading, collaborative support at the 2103 working face. The results showed that the ultimate hanging arch length was most influenced by the width of the plastic zone, followed by the width of the roadway, supporting strength, anchoring strength, layered thickness, and mining depth, while the ultimate tensile strength had little influence. The initial support resistance of the entry-side supports was closely related to the ultimate hanging arch length and the process of gob-side entry retaining. The improved entry-retaining supporting process could control the sharp surface convergence of the surrounding rocks of the entry retaining, the sinkage of the roof of the entry-retaining section was controlled below 100 mm, and that of the advanced section was controlled below 50 mm. The stability of the supports next to the entry is improved, and the needs of the site project are met.Peng LiXigui ZhengXiaowei GuoBoyang LiCong WangHindawi LimitedarticlePhysicsQC1-999ENShock and Vibration, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Peng Li Xigui Zheng Xiaowei Guo Boyang Li Cong Wang Application of the Ultimate Hanging Arch Length of the Layered Roof with Anchors and the Gob-Side Entry Retaining
description	The gob-side entry retaining plays an important role in improving working face ventilation, alleviating working face connection, and increasing mining revenue. According to the characteristics of the crossheading roof at the 2103 working face of a mine in Shanxi, a structural mechanics model of the roof was established to derive the theoretical formulae for the ultimate hanging arch length of the layered roof with anchors and the initial support resistance of the entry-side support. The influence factors of the ultimate hanging arch length were evaluated using local sensitivity analysis. Based on the theoretical study, the work proposed the collaborative support technology of the crossheading, collaborative support at the 2103 working face. The results showed that the ultimate hanging arch length was most influenced by the width of the plastic zone, followed by the width of the roadway, supporting strength, anchoring strength, layered thickness, and mining depth, while the ultimate tensile strength had little influence. The initial support resistance of the entry-side supports was closely related to the ultimate hanging arch length and the process of gob-side entry retaining. The improved entry-retaining supporting process could control the sharp surface convergence of the surrounding rocks of the entry retaining, the sinkage of the roof of the entry-retaining section was controlled below 100 mm, and that of the advanced section was controlled below 50 mm. The stability of the supports next to the entry is improved, and the needs of the site project are met.
format	article
author	Peng Li Xigui Zheng Xiaowei Guo Boyang Li Cong Wang
author_facet	Peng Li Xigui Zheng Xiaowei Guo Boyang Li Cong Wang
author_sort	Peng Li
title	Application of the Ultimate Hanging Arch Length of the Layered Roof with Anchors and the Gob-Side Entry Retaining
title_short	Application of the Ultimate Hanging Arch Length of the Layered Roof with Anchors and the Gob-Side Entry Retaining
title_full	Application of the Ultimate Hanging Arch Length of the Layered Roof with Anchors and the Gob-Side Entry Retaining
title_fullStr	Application of the Ultimate Hanging Arch Length of the Layered Roof with Anchors and the Gob-Side Entry Retaining
title_full_unstemmed	Application of the Ultimate Hanging Arch Length of the Layered Roof with Anchors and the Gob-Side Entry Retaining
title_sort	application of the ultimate hanging arch length of the layered roof with anchors and the gob-side entry retaining
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/55b645685eb1473d88f57a36be42c317
work_keys_str_mv	AT pengli applicationoftheultimatehangingarchlengthofthelayeredroofwithanchorsandthegobsideentryretaining AT xiguizheng applicationoftheultimatehangingarchlengthofthelayeredroofwithanchorsandthegobsideentryretaining AT xiaoweiguo applicationoftheultimatehangingarchlengthofthelayeredroofwithanchorsandthegobsideentryretaining AT boyangli applicationoftheultimatehangingarchlengthofthelayeredroofwithanchorsandthegobsideentryretaining AT congwang applicationoftheultimatehangingarchlengthofthelayeredroofwithanchorsandthegobsideentryretaining
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Application of the Ultimate Hanging Arch Length of the Layered Roof with Anchors and the Gob-Side Entry Retaining

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