Bearing properties and influence laws of concrete-filled steel tubular arches for underground mining roadway support

The concrete-filled steel tubular (CFST) arch is a new high-strength support form for a mine roadway in deep/soft rock stratum; however, the bearing characteristics have not been clearly elucidated for scientifically guiding field applications. Numerical simulation tests with 15 schemes shaped as a...

Full description

Bibliographic Details
Main Authors: Mei Yuchun, Li Xiuming, Li Weiteng, Yang Ning, Zhang Yuhua, Zhang Shuo
Format: Article
Language:English
Published: De Gruyter 2020-03-01
Series:Science and Engineering of Composite Materials
Subjects:
Online Access:https://doi.org/10.1515/secm-2020-0008
id doaj-d76939a65eb64a39b827fc139d8ae5b9
record_format Article
spelling doaj-d76939a65eb64a39b827fc139d8ae5b92021-09-05T14:00:33ZengDe GruyterScience and Engineering of Composite Materials0792-12332191-03592020-03-01271738810.1515/secm-2020-0008secm-2020-0008Bearing properties and influence laws of concrete-filled steel tubular arches for underground mining roadway supportMei Yuchun0Li Xiuming1Li Weiteng2Yang Ning3Zhang Yuhua4Zhang Shuo5Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention, Shandong University of Science and Technology, Shandong, Qingdao266590, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention, Shandong University of Science and Technology, Shandong, Qingdao266590, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention, Shandong University of Science and Technology, Shandong, Qingdao266590, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention, Shandong University of Science and Technology, Shandong, Qingdao266590, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention, Shandong University of Science and Technology, Shandong, Qingdao266590, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention, Shandong University of Science and Technology, Shandong, Qingdao266590, ChinaThe concrete-filled steel tubular (CFST) arch is a new high-strength support form for a mine roadway in deep/soft rock stratum; however, the bearing characteristics have not been clearly elucidated for scientifically guiding field applications. Numerical simulation tests with 15 schemes shaped as a ‘half circle with two straight legs’ and 10 schemes shaped as a circle were conducted, and the main responses of the numerical model were verified by performing the laboratory tests to evaluate the basic CFST structures and global CFST arches. The bearing and failure behaviors of the CFST arches were studied, and the influence laws, in terms of the arch shape, size and lateral pressure coefficient λ, were further investigated. The results show that the bearing capacity of a circular arch is significantly higher than that of a straight-leg arch under a uniform load. Furthermore, the bearing capacity of the circular arch decreases considerably with the increase in the arch size or λ. In addition, the bearing capacity of a straight-leg arch decreases with the increase in the leg height and arch size; however, it first increases and later decreases with the increase in λ. The failure modes of all the arches correspond to the instability at the extreme point caused by the strength deterioration, except in the case of a circular arch under a uniform pressure, the failure mode of which corresponds to the instability at the branch points. Finally, the recommendations for the field practice are proposed and verified.https://doi.org/10.1515/secm-2020-0008mine roadwayconcrete-filled steel tubesupporting archbearing characteristic
collection DOAJ
language English
format Article
sources DOAJ
author Mei Yuchun
Li Xiuming
Li Weiteng
Yang Ning
Zhang Yuhua
Zhang Shuo
spellingShingle Mei Yuchun
Li Xiuming
Li Weiteng
Yang Ning
Zhang Yuhua
Zhang Shuo
Bearing properties and influence laws of concrete-filled steel tubular arches for underground mining roadway support
Science and Engineering of Composite Materials
mine roadway
concrete-filled steel tube
supporting arch
bearing characteristic
author_facet Mei Yuchun
Li Xiuming
Li Weiteng
Yang Ning
Zhang Yuhua
Zhang Shuo
author_sort Mei Yuchun
title Bearing properties and influence laws of concrete-filled steel tubular arches for underground mining roadway support
title_short Bearing properties and influence laws of concrete-filled steel tubular arches for underground mining roadway support
title_full Bearing properties and influence laws of concrete-filled steel tubular arches for underground mining roadway support
title_fullStr Bearing properties and influence laws of concrete-filled steel tubular arches for underground mining roadway support
title_full_unstemmed Bearing properties and influence laws of concrete-filled steel tubular arches for underground mining roadway support
title_sort bearing properties and influence laws of concrete-filled steel tubular arches for underground mining roadway support
publisher De Gruyter
series Science and Engineering of Composite Materials
issn 0792-1233
2191-0359
publishDate 2020-03-01
description The concrete-filled steel tubular (CFST) arch is a new high-strength support form for a mine roadway in deep/soft rock stratum; however, the bearing characteristics have not been clearly elucidated for scientifically guiding field applications. Numerical simulation tests with 15 schemes shaped as a ‘half circle with two straight legs’ and 10 schemes shaped as a circle were conducted, and the main responses of the numerical model were verified by performing the laboratory tests to evaluate the basic CFST structures and global CFST arches. The bearing and failure behaviors of the CFST arches were studied, and the influence laws, in terms of the arch shape, size and lateral pressure coefficient λ, were further investigated. The results show that the bearing capacity of a circular arch is significantly higher than that of a straight-leg arch under a uniform load. Furthermore, the bearing capacity of the circular arch decreases considerably with the increase in the arch size or λ. In addition, the bearing capacity of a straight-leg arch decreases with the increase in the leg height and arch size; however, it first increases and later decreases with the increase in λ. The failure modes of all the arches correspond to the instability at the extreme point caused by the strength deterioration, except in the case of a circular arch under a uniform pressure, the failure mode of which corresponds to the instability at the branch points. Finally, the recommendations for the field practice are proposed and verified.
topic mine roadway
concrete-filled steel tube
supporting arch
bearing characteristic
url https://doi.org/10.1515/secm-2020-0008
work_keys_str_mv AT meiyuchun bearingpropertiesandinfluencelawsofconcretefilledsteeltubulararchesforundergroundminingroadwaysupport
AT lixiuming bearingpropertiesandinfluencelawsofconcretefilledsteeltubulararchesforundergroundminingroadwaysupport
AT liweiteng bearingpropertiesandinfluencelawsofconcretefilledsteeltubulararchesforundergroundminingroadwaysupport
AT yangning bearingpropertiesandinfluencelawsofconcretefilledsteeltubulararchesforundergroundminingroadwaysupport
AT zhangyuhua bearingpropertiesandinfluencelawsofconcretefilledsteeltubulararchesforundergroundminingroadwaysupport
AT zhangshuo bearingpropertiesandinfluencelawsofconcretefilledsteeltubulararchesforundergroundminingroadwaysupport
_version_ 1717811753089236992