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Bulletin of Engineering Geology and the Environment

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01-05-2022 | Original Paper

Asymmetric deformation failure mechanism and support technology of roadways under non-uniform pressure from a mining disturbance

Authors: Maolin Tian, Lijun Han, Xuxu Yang, Qiang Feng, Qingbin Meng, Yunyue Xie, Wenshuai Li, Chao Ma

Published in: Bulletin of Engineering Geology and the Environment | Issue 5/2022

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Abstract

The asymmetric and large deformation of roadways under non-uniform pressure caused by a mining disturbance has been a difficulty in many coal mines in China. In this paper, the characteristics and types of non-uniform pressure stress fields are analyzed by numerical simulation. Then, a detailed numerical modeling is established to study the deformation and failure mechanism under different types of non-uniform pressure stress. A new support system of “bolt-cable-shotcrete-deep and shallow holes grouting” is proposed to control the deformation of the roadway under non-uniform pressure, and the numerical simulation and in situ monitoring test are performed to prove control effect. The results show that there are two main types of non-uniform pressure stress fields: V-shaped and oblique line-shaped fields above the roadway under a mining disturbance. The plastic zone, asymmetric deformation, and non-uniformity indices of the roadway increase with the increase in deviation coefficient, and the failure of the surrounding rock is mainly shear failure, which is accompanied by a small amount of local tensile failure. The numerical simulation and in situ monitoring indicate that the new support scheme can effectively control the asymmetric and large deformation of the No. 20101 belt roadway, which can provide references for studies of the deformation failure and scientific control technology of roadways under non-uniform pressure.

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Title: Asymmetric deformation failure mechanism and support technology of roadways under non-uniform pressure from a mining disturbance
Authors: Maolin Tian
Lijun Han
Xuxu Yang
Qiang Feng
Qingbin Meng
Yunyue Xie
Wenshuai Li
Chao Ma
Publication date: 01-05-2022
Publisher: Springer Berlin Heidelberg
Published in: Bulletin of Engineering Geology and the Environment / Issue 5/2022
Print ISSN: 1435-9529
Electronic ISSN: 1435-9537
DOI: https://doi.org/10.1007/s10064-022-02710-2

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