Study of the Influence of Damage Structures in Coal Seam Floors on the Damage of Small Hidden Faults

Liming Yin, Yuanhang Zhang (), Juntao Chen (), Borui Wang, Yifeng Zeng and Qianhui Liu
Additional contact information
Liming Yin: College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Yuanhang Zhang: College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Juntao Chen: College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Borui Wang: College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Yifeng Zeng: College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Qianhui Liu: College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China

Sustainability, 2023, vol. 15, issue 20, 1-15

Abstract: In order to study the catastrophe law of small hidden faults along the floors of deep quarries under the coupled conditions of high stress and strong seepage, this paper proposes a concept of damage structure that can replace the overall performance of a population of tiny fracture swarms within a non-homogeneous rock mass. Numerical simulation software is used to simulate and analyze the influence of damage structure on the evolution of surrounding rock, regarding its plastic zones, shear stress, and displacement, and the pore water pressure distribution in small hidden faults along coal seam floors. This study shows that under the influence of damage structure, the shear stress of the rock above the fault shows “N”-type change, the displacement of the surrounding area shows “S”-type change, and the shear stress of the rock below the fault and the pore water pressure above the fault show “M”-type change. The damage structure changes the performance of the coal seam floor’s water barrier by reducing the strength of the rock surrounding the fault, blocking the release rate of the shear stress of the surrounding rock, weakening the support pressure of the fault, reducing the degree of expansion of the surrounding rocks and shifting the direction of concentration of the pore water pressure. The results of this study can provide a reference for technology for water damage prevention and control of coal seam floors containing small hidden faults, under the influence of non-homogeneous rock bodies.

Keywords: damaged structure; small hidden fault; water inrush from the coal seam floor; numerical simulation (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:

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/20/15010/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/20/15010/ (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:15:y:2023:i:20:p:15010-:d:1262213

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 ().