Corrosive Environment Assessment and Corrosion-Induced Rockbolt Failure Analysis in a Costal Underground Mine

As an effective ground-reinforcing system, rockbolts have been widely used in underground excavations. Corrosion of rockbolts has been one of the most reasons for rockbolts system failure. In this paper, the chemical composition and pH values of the groundwater in Sanshandao Gold mine are first test...

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Main Authors:	Qifeng Guo, Jiliang Pan, Min Wang, Meifeng Cai, Xun Xi
Format:	Article
Language:	English
Published:	Hindawi Limited 2019-01-01
Series:	International Journal of Corrosion
Online Access:	http://dx.doi.org/10.1155/2019/2105842

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spelling	doaj-f5da02f64eb147829680a4ae757b9e522020-11-24T22:02:23ZengHindawi LimitedInternational Journal of Corrosion1687-93251687-93332019-01-01201910.1155/2019/21058422105842Corrosive Environment Assessment and Corrosion-Induced Rockbolt Failure Analysis in a Costal Underground MineQifeng Guo0Jiliang Pan1Min Wang2Meifeng Cai3Xun Xi4School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaAs an effective ground-reinforcing system, rockbolts have been widely used in underground excavations. Corrosion of rockbolts has been one of the most reasons for rockbolts system failure. In this paper, the chemical composition and pH values of the groundwater in Sanshandao Gold mine are first tested. Corrosion of the slotted rockbolts used in roadways of the mine is analysed. The corrosion rate of rockbolts is evaluated based on experimental results from similar corrosive conditions. A time-dependent analytical model on anchoring force degradation caused by corrosion of the rockbolt is developed. Furthermore, the effects of corrosion rate and geometric parameters of the slotted rockbolts on anchoring force degradation are discussed. Suggestions on rockbolts support design in corrosive conditions are given. It has been found that, with the corrosion time increasing, the anchoring force between the rock and the rockbolt gradually decreases. The larger the corrosion rate is, the faster the anchoring force decreases. For long-term service roadways under corrosive conditions, a slotted rockbolt with a smaller radius and thicker wall can enhance the anchoring force.http://dx.doi.org/10.1155/2019/2105842
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Qifeng Guo Jiliang Pan Min Wang Meifeng Cai Xun Xi
spellingShingle	Qifeng Guo Jiliang Pan Min Wang Meifeng Cai Xun Xi Corrosive Environment Assessment and Corrosion-Induced Rockbolt Failure Analysis in a Costal Underground Mine International Journal of Corrosion
author_facet	Qifeng Guo Jiliang Pan Min Wang Meifeng Cai Xun Xi
author_sort	Qifeng Guo
title	Corrosive Environment Assessment and Corrosion-Induced Rockbolt Failure Analysis in a Costal Underground Mine
title_short	Corrosive Environment Assessment and Corrosion-Induced Rockbolt Failure Analysis in a Costal Underground Mine
title_full	Corrosive Environment Assessment and Corrosion-Induced Rockbolt Failure Analysis in a Costal Underground Mine
title_fullStr	Corrosive Environment Assessment and Corrosion-Induced Rockbolt Failure Analysis in a Costal Underground Mine
title_full_unstemmed	Corrosive Environment Assessment and Corrosion-Induced Rockbolt Failure Analysis in a Costal Underground Mine
title_sort	corrosive environment assessment and corrosion-induced rockbolt failure analysis in a costal underground mine
publisher	Hindawi Limited
series	International Journal of Corrosion
issn	1687-9325 1687-9333
publishDate	2019-01-01
description	As an effective ground-reinforcing system, rockbolts have been widely used in underground excavations. Corrosion of rockbolts has been one of the most reasons for rockbolts system failure. In this paper, the chemical composition and pH values of the groundwater in Sanshandao Gold mine are first tested. Corrosion of the slotted rockbolts used in roadways of the mine is analysed. The corrosion rate of rockbolts is evaluated based on experimental results from similar corrosive conditions. A time-dependent analytical model on anchoring force degradation caused by corrosion of the rockbolt is developed. Furthermore, the effects of corrosion rate and geometric parameters of the slotted rockbolts on anchoring force degradation are discussed. Suggestions on rockbolts support design in corrosive conditions are given. It has been found that, with the corrosion time increasing, the anchoring force between the rock and the rockbolt gradually decreases. The larger the corrosion rate is, the faster the anchoring force decreases. For long-term service roadways under corrosive conditions, a slotted rockbolt with a smaller radius and thicker wall can enhance the anchoring force.
url	http://dx.doi.org/10.1155/2019/2105842
work_keys_str_mv	AT qifengguo corrosiveenvironmentassessmentandcorrosioninducedrockboltfailureanalysisinacostalundergroundmine AT jiliangpan corrosiveenvironmentassessmentandcorrosioninducedrockboltfailureanalysisinacostalundergroundmine AT minwang corrosiveenvironmentassessmentandcorrosioninducedrockboltfailureanalysisinacostalundergroundmine AT meifengcai corrosiveenvironmentassessmentandcorrosioninducedrockboltfailureanalysisinacostalundergroundmine AT xunxi corrosiveenvironmentassessmentandcorrosioninducedrockboltfailureanalysisinacostalundergroundmine
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Corrosive Environment Assessment and Corrosion-Induced Rockbolt Failure Analysis in a Costal Underground Mine

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