Version 1
: Received: 4 March 2024 / Approved: 4 March 2024 / Online: 4 March 2024 (10:58:01 CET)
How to cite:
LI, H.; WANG, H.; LIU, C. Mechanical Model and Finite Element Analysis of Concrete False Roof in Downward Approach Type Infill Quarry. Preprints2024, 2024030128. https://doi.org/10.20944/preprints202403.0128.v1
LI, H.; WANG, H.; LIU, C. Mechanical Model and Finite Element Analysis of Concrete False Roof in Downward Approach Type Infill Quarry. Preprints 2024, 2024030128. https://doi.org/10.20944/preprints202403.0128.v1
LI, H.; WANG, H.; LIU, C. Mechanical Model and Finite Element Analysis of Concrete False Roof in Downward Approach Type Infill Quarry. Preprints2024, 2024030128. https://doi.org/10.20944/preprints202403.0128.v1
APA Style
LI, H., WANG, H., & LIU, C. (2024). Mechanical Model and Finite Element Analysis of Concrete False Roof in Downward Approach Type Infill Quarry. Preprints. https://doi.org/10.20944/preprints202403.0128.v1
Chicago/Turabian Style
LI, H., HONGJIANG WANG and CHUNKANG LIU. 2024 "Mechanical Model and Finite Element Analysis of Concrete False Roof in Downward Approach Type Infill Quarry" Preprints. https://doi.org/10.20944/preprints202403.0128.v1
Abstract
Concrete is more stable than filler as a false roof in a downward approach type infill quarry, but the mechanical model of a concrete false roof is not clear. As a result, there has been limited application. Therefore, it is necessary to establish the mechanical model of a concrete artificial false roof to enhance the stability of the downward approach infill quarry. This paper combines theoretical analysis, model derivation, finite element analysis and field application methods. Firstly, the basic assumptions of thin plate theory and elasticity mechanics are used as the premise to establish the differential equations of the deflection curve of the concrete thin plate false roof. Then, the three types of bending moment generation of the concrete thin plate false roof are explored. Secondly, the relationship between the location of dangerous surface and dangerous point in hard-supported weak-slab structure and soft-supported weak-slab structure is analyzed, and the type of uniform load and calculation model of concrete thin-slab false roof are improved. Finally, according to the established mechanical model of thin slab false roof, finite element analysis and field application were carried out. The results show that there are three types of deflection curve differential equations in the concrete thin slab false roof perpendicular to the strike, and three extreme points exist in the middle section of the thin slab and on both sides of the surrounding rock. The hazardous surface of the hard-supported weak-slab structure is present at the intersection of the encircling rock and the thin-slab fake ceiling, with the perilous point situated on the top of this surface. The hazardous surface of the soft-supported weak-slab structure can be found in the centre section of the thin-slab fake ceiling, with the perilous point being located at the bottom of this surface. Moreover, the damage mode for both structures is that of maximum tensile stress damage. Upon conducting a finite element analysis, the results indicate that the concrete's maximum tensile stress is significantly high.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
