Characteristics of Roof Collapse of Mining Tunnels in the Fault Fracture Zone and Distribution of the Boundary Force of the Accumulation Body

Guohua Zhang, Mengsen Liu (), Tao Qin, Lei Wang, Yanwei Duan and Zibo Li
Additional contact information
Guohua Zhang: Key Laboratory of Mining Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
Mengsen Liu: College of Mining Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
Tao Qin: College of Mining Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
Lei Wang: College of Safety Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
Yanwei Duan: College of Safety Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
Zibo Li: College of Safety Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China

Sustainability, 2022, vol. 14, issue 24, 1-13

Abstract: Under the influence of coal mining, the gravel in mining tunnel sections of a fault fracture zone is prone to collapse, and the collapse accumulation body will block the tunnel, which has a very adverse influence on the safety production of coal mining and the evacuation of personnel after underground disasters. The macroscopic and mechanical characteristics of the collapse accumulation body have been studied extensively in previous works. The purpose of this paper is to provide theoretical support and reference for the rapid excavation of the tunnel blocked by the collapse accumulation body in the fault fracture zone. Taking the fault fracture zone in the tunnel as the research background, the physical characteristics and boundary mechanical characteristics of the collapse accumulation body in the fault fracture zone are studied by the method of combining on-site investigation and theoretical analysis. The results show that the force acting on the boundary on both sides of the accumulation body is passive resistance from the side wall, which is derived from the slip effect of the accumulation body slope. Similarly, the unstable boundary of the fault fracture zone caused by tunnel instability is elliptical, and the overlying load of the rescue channel to be excavated in the accumulation body is limited. On the basis of the collapse instability dimensions of the broken zone of the tunnel surrounding the rock, the calculation formulas of the height of the accumulation body and the horizontal force at the boundary were established, respectively, under two conditions of whether the collapse space was filled, and whether the curve relationship between the distribution of the horizontal force at the boundary of the accumulation body and the buried depth in the accumulation body was obtained.

Keywords: fault fracture zone; mining tunnel; roof collapse; accumulation body; physical characteristics; mechanical characteristics (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/14/24/16811/pdf (application/pdf)
https://www.mdpi.com/2071-1050/14/24/16811/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:14:y:2022:i:24:p:16811-:d:1003760

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().