Mechanism and Control of Asymmetric Floor Heave in Deep Roadway Disturbed by Roof Fracture

Wensheng Wei (), Guojun Zhang (), Chunyuan Li, Wenshuai Zhang and Yupeng Shen
Additional contact information
Wensheng Wei: School of Energy and Mining, China University of Mining and Technology (Beijing), Beijing 100083, China
Guojun Zhang: Institute of Mine Safety Technology, China Academy of Safety Science and Technology, Beijing 100012, China
Chunyuan Li: Deep Mining and Rock Burst Research Institute, China Academy of Coal Science, Beijing 100013, China
Wenshuai Zhang: School of Energy and Mining, China University of Mining and Technology (Beijing), Beijing 100083, China
Yupeng Shen: School of Energy and Mining, China University of Mining and Technology (Beijing), Beijing 100083, China

Sustainability, 2023, vol. 15, issue 8, 1-21

Abstract: In view of the serious problem of bottom-drum damage in deep mining along empty roadways, the asymmetric bottom-drum damage characteristics and control mechanisms of deep mining along an empty roadway were studied using the trackway of the 11060 working face in Zhao Gu II mine as the research background. Based on the slip-line theory, support-pressure distribution law, and Griffith’s damage-criterion theory, the mechanism of asymmetric bottom drums and the maximum fracture-development depth of the bottom plate in a deep roadway under top-plate fracture perturbation were analyzed. The 3DEC discrete-element software was used to simulate and analyze the characteristics and evolution of the asymmetric bottom bulge of the roadway under dynamic-load disturbance, and the asymmetric control scheme of “slurry anchor reinforcement + top cutting and pressure relief” was proposed. The results show that, under the influence of static load of deep high-abutment pressure and the dynamic-load impact of the instability of the masonry-beam structure under periodic pressure of the adjacent working face, the deep-mining goaf roadway was prone to producing asymmetric floor heave. The floor-heave degree and maximum fracture-development range of the roadway in the affected area under the influence of dynamic load > those in goaf roadway > those in the roadway in the stable area affected by tunneling. The distribution of stress, displacement, and maximum floor heave was skewed to the side of the coal pillar in the goaf, showing an inverted right oblique V shape. The asymmetric floor heave of a roadway can be effectively controlled by grouting anchor-cable reinforcement (increasing the anti-damage limit) and roof-cutting pressure relief (cutting off the dynamic-load source). The research results can provide an important reference for the control of roadway floors under similar geological conditions.

Keywords: deep mining roadway; asymmetric floor heave; geological radar; 3DEC; dynamic-load disturbance (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 references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/8/6357/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/8/6357/ (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:8:p:6357-:d:1118234

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 ().