Analysis of Formation Mechanism of Slightly Inclined Bedding Mudstone Landslide in Coal Mining Subsidence Area Based on Finite–Discrete Element Method

Jiaxin Zhong (), Zhengjun Mao, Wankui Ni, Jia Zhang, Gaoyang Liu, Jinge Zhang and Mimi Geng
Additional contact information
Jiaxin Zhong: College of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, China
Zhengjun Mao: College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China
Wankui Ni: College of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, China
Jia Zhang: Ningxia Institute of Survey and Monitoring of Land and Resources, Yinchuan 750002, China
Gaoyang Liu: College of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, China
Jinge Zhang: College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China
Mimi Geng: College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China

Mathematics, 2022, vol. 10, issue 21, 1-25

Abstract: In this paper, the formation mechanism of a slightly inclined bedding mudstone landslide in the overlying mountain of the coal mining subsidence area of the Tanshan Coal Mine in Ningxia, China, is studied. By means of geotechnical investigation, indoor geotechnical tests, theoretical analysis and other technical means, we find the geological environment background of the study area and obtain the physical and mechanical property indexes of the mining landslide in the Tanshan Coal Mine. By combining the numerical simulation of discrete elements and finite elements, the macro deformation and failure law of the mining mudstone landslide and the displacement and stress nephogram of the failure process are discussed. The results show that the slightly inclined bedding mudstone landslide in the Tanshan Coal Mine is 850 m long from east to west, 500 m wide from north to south and 10,875,000 m 3 in volume. It is composed of Jurassic mudstone and is a traction landslide caused by the coal mining subsidence area. The formation of the landslide is affected by internal factors and inducing factors. The internal factors are mainly geotechnical types and engineering geological properties, and the inducing factors are mainly coal mining activities and rainfall. By analyzing and summarizing the calculation process of the slope model prior to the landslide in 2D-Block and GeoStudio numerical simulation software, the sliding process of the slightly inclined bedding mudstone landslide in the Tanshan Coal Mine is divided into four stages: slope creep, slope deformation, landslide movement and landslide accumulation. GeoStudio software is used to calculate the stability of the Tanshan Coal Mine landslide under natural and rainfall conditions. The landslide is in a stable state under natural conditions and is basically stable under rainfall conditions. By comparing the calculation results of the limit equilibrium method and the finite element limit equilibrium method, we find that the calculated stability coefficient is more accurate when the appropriate constitutive model is selected. The research results have important reference significance for the prevention and control of the gently inclined bedding mudstone landslide of the overlying mountain in the coal mining subsidence area of the Loess Plateau.

Keywords: coal mining subsidence area; slightly inclined bedding mudstone landslide in the Tanshan Coal Mine; formation mechanism; numerical simulation; limit equilibrium method; Ningxia, China (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/2227-7390/10/21/3995/pdf (application/pdf)
https://www.mdpi.com/2227-7390/10/21/3995/ (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:jmathe:v:10:y:2022:i:21:p:3995-:d:955383

Access Statistics for this article

Mathematics is currently edited by Ms. Emma He

More articles in Mathematics from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().