Mechanical Properties of the Combination of Surrounding Rock and Primary Support under Impacting Load

Zhouyuan Ye, Liling Zhang (), Zhihua Zhou, Kun Pan, Xubin Liu, Wenhui Liu and Qiuhong Wu
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Zhouyuan Ye: School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Liling Zhang: School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Zhihua Zhou: School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Kun Pan: School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Xubin Liu: School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Wenhui Liu: School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Qiuhong Wu: South Coal Mine Gas and Roof Disaster Prevention and Control Safety Production Key Laboratory, Xiangtan 411201, China

Sustainability, 2023, vol. 15, issue 5, 1-16

Abstract: The SHPB experimental device was adopted to carry out the uniaxial impact tests in studying the failure characteristics of the combination of surrounding rocks and primary support for the tunnel, so as to explore the key factors affecting its dynamic strength and deforming properties. To simplify the practice model of the tunnel construction, the specimens combined by the surrounding rock and primary support were simulated by the concentric annular sandstone and cement mortar in this paper. The results indicate that the thickness of the primary support, the thickness of the surrounding rock and the proportion of the thickness of the primary support are the key factors affecting the dynamic strength of the combination of the surrounding rock and the primary support. The influence of dynamic loads on tunnel construction can be weakened by adjusting the above three factors, so that to improve the supporting capacity. The research has a significant reference for the designing of tunnel engineering under complex loads.

Keywords: surrounding rock lining combination; uniaxial impact; SHPB experimental device; support optimization (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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