Calculation of Residual Surface Subsidence Above Abandoned Longwall Coal Mining

Ximin Cui, Yuling Zhao, Guorui Wang, Bing Zhang and Chunyi Li
Additional contact information
Ximin Cui: Institute of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Yuling Zhao: Institute of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Guorui Wang: Institute of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Bing Zhang: School of Resources and Environmental Science, Shijiazhuang University, Shijiazhuang 050035, China
Chunyi Li: School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China

Sustainability, 2020, vol. 12, issue 4, 1-12

Abstract: Exhausted or abandoned underground longwall mining may lead to long-term residual subsidence on surface land, which can cause some problems when the mined-out land is used for construction, land reclamation and ecological reconstruction. Thus, it is important to assess the stability and suitability of the land with a consideration of residual surface subsidence. Assuming a linear monotonic decrease in the annual residual surface subsidence, the limit of the sum of the annual residual subsidence factor, and continuity between surface subsidence in the last year of the weakening period and the residual surface subsidence in the first year, we establish a model to calculate the duration of residual subsidence and the annual residual surface subsidence factor caused by abandoned longwall coal mining. The duration of residual surface subsidence increases with the increase in mining thickness as well as the factor of extreme residual subsidence. The proposed method can quantitatively calculate the annual residual subsidence, the accumulative residual subsidence, and the potential future accumulative residual subsidence. This approach can be used to reasonably evaluate the stability and suitability of old mining subsidence areas and will be beneficial for the design of mining subsidence land reclamation and ecological reconstruction.

Keywords: longwall coal mining; residual surface subsidence; quantitative prediction; stability; land reclamation; ecological reconstruction (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (9)

Downloads: (external link)
https://www.mdpi.com/2071-1050/12/4/1528/pdf (application/pdf)
https://www.mdpi.com/2071-1050/12/4/1528/ (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:12:y:2020:i:4:p:1528-:d:322125

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 ().