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Open AccessArticle

Deformation Characteristics and Control Method of Kilometer-Depth Roadways in a Nickel Mine: A Case Study

by 1,2,3, 1,2,*, 1,2 and 1,2
1
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
2
Innovation Academy for Earth Science, CAS, Beijing 100029, China
3
University of Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(11), 3937; https://doi.org/10.3390/app10113937
Received: 14 April 2020 / Revised: 6 May 2020 / Accepted: 18 May 2020 / Published: 5 June 2020
(This article belongs to the Special Issue Advances in Geotechnical Engineering)
Deformation failure and support methods of roadways have always been critical issues in mining production and safety, especially for roadways buried in complex engineering geological conditions. To resolve these support issues of kilometer-depth roadways under high ground stress and broken rock mass, a case study on the roadways in the No. 2 mining area of Jinchuan Mine, China, is presented in this paper. Based on a detailed field survey, the deformation characteristics of the roadways and failure modes of supporting structures were investigated. It was found that the horizontal deformations were serious, and the primary support was not able to control the surrounding rock well. Additionally, a broken rock zone test was carried out, which indicated that a zonal disintegration phenomenon occurred around the roadways and the maximum depth of the fractured zone was more than 4.8 m. In order to effectively limit the deformation in the roadways, a new support scheme called the “multistage anchorage + concrete-filled steel tube” was put forward. To further assess the support behavior of the new method, we selected a test roadway in the research area, and numerical simulations and in-situ monitoring were conducted. The findings suggest that the roadway’s serious deformation under high ground stress and broken rock mass could be successfully controlled by the new control method, which can provide a reference for other engineering solutions under similar geological conditions. View Full-Text
Keywords: 1000 m-depth roadway; deformation characteristics; zonal disintegration; FLAC3D; concrete-filled steel tube 1000 m-depth roadway; deformation characteristics; zonal disintegration; FLAC3D; concrete-filled steel tube
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MDPI and ACS Style

Li, G.; Ma, F.; Guo, J.; Zhao, H. Deformation Characteristics and Control Method of Kilometer-Depth Roadways in a Nickel Mine: A Case Study. Appl. Sci. 2020, 10, 3937. https://doi.org/10.3390/app10113937

AMA Style

Li G, Ma F, Guo J, Zhao H. Deformation Characteristics and Control Method of Kilometer-Depth Roadways in a Nickel Mine: A Case Study. Applied Sciences. 2020; 10(11):3937. https://doi.org/10.3390/app10113937

Chicago/Turabian Style

Li, Guang; Ma, Fengshan; Guo, Jie; Zhao, Haijun. 2020. "Deformation Characteristics and Control Method of Kilometer-Depth Roadways in a Nickel Mine: A Case Study" Appl. Sci. 10, no. 11: 3937. https://doi.org/10.3390/app10113937

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