Surface Subsidence Prediction Method for Backfill Mining in Shallow Coal Seams with Hard Roofs for Building Protection

Wenqi Huo, Huaizhan Li (), Guangli Guo, Yuezong Wang and Yafei Yuan
Additional contact information
Wenqi Huo: Key Laboratory of Resources and Environment Information Engineering, China University of Mining and Technology, Xuzhou 221116, China
Huaizhan Li: Key Laboratory of Resources and Environment Information Engineering, China University of Mining and Technology, Xuzhou 221116, China
Guangli Guo: Key Laboratory of Resources and Environment Information Engineering, China University of Mining and Technology, Xuzhou 221116, China
Yuezong Wang: Key Laboratory of Resources and Environment Information Engineering, China University of Mining and Technology, Xuzhou 221116, China
Yafei Yuan: School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China

Sustainability, 2023, vol. 15, issue 22, 1-18

Abstract: The mining of shallow coal seams with hard roofs poses a threat to surface structures. In order to ensure the protection of these buildings, backfill mining is increasingly used in these types of coal seams. However, due to the lack of appropriate surface subsidence prediction methods, there are concerns about whether backfill mining can meet the requirements of building protection. In this study, through numerical simulation and physical experiments, the movement characteristics of the strata and surface were studied in the backfill mining of a shallow coal seam with a hard roof. Our results indicate that the backfilling ratio significantly influences strata movement and surface subsidence. As the backfilling ratio increases, the surface deformation in the backfill under the hard roof of the shallow coal seam transitions from discontinuous to continuous. When the backfilling ratio exceeds 60%, the deformation characteristics of the overburden and surface align with the probability integral method model. Consequently, a novel surface subsidence prediction method for backfill mining in shallow coal seams under hard roofs is proposed. This method was successfully applied at Yungang Mine, validating its effectiveness. These research findings have significant practical implications for the design of backfill mining in shallow coal seams under hard roofs.

Keywords: numerical simulation; backfill mining; shallow coal seam mining under hard roof; subsidence prediction (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/2071-1050/15/22/15791/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/22/15791/ (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:22:p:15791-:d:1277118

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 ().