Analysis of Formation Mechanism of Slightly Inclined Bedding Mudstone Landslide in Coal Mining Subsidence Area Based on Finite–Discrete Element Method
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 ot...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-10-01
|
| Series: | Mathematics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2227-7390/10/21/3995 |
| _version_ | 1797467388920201216 |
|---|---|
| author | Jiaxin Zhong Zhengjun Mao Wankui Ni Jia Zhang Gaoyang Liu Jinge Zhang Mimi Geng |
| author_facet | Jiaxin Zhong Zhengjun Mao Wankui Ni Jia Zhang Gaoyang Liu Jinge Zhang Mimi Geng |
| author_sort | Jiaxin Zhong |
| collection | DOAJ |
| description | 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<sup>3</sup> 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. |
| first_indexed | 2024-03-09T18:52:57Z |
| format | Article |
| id | doaj.art-7ac326692b274a24b31cd8c10f761460 |
| institution | Directory Open Access Journal |
| issn | 2227-7390 |
| language | English |
| last_indexed | 2024-03-09T18:52:57Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Mathematics |
| spelling | doaj.art-7ac326692b274a24b31cd8c10f7614602023-11-24T05:43:15ZengMDPI AGMathematics2227-73902022-10-011021399510.3390/math10213995Analysis of Formation Mechanism of Slightly Inclined Bedding Mudstone Landslide in Coal Mining Subsidence Area Based on Finite–Discrete Element MethodJiaxin Zhong0Zhengjun Mao1Wankui Ni2Jia Zhang3Gaoyang Liu4Jinge Zhang5Mimi Geng6College of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, ChinaCollege of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, ChinaNingxia Institute of Survey and Monitoring of Land and Resources, Yinchuan 750002, ChinaCollege of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, ChinaCollege of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, ChinaIn 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<sup>3</sup> 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.https://www.mdpi.com/2227-7390/10/21/3995coal mining subsidence areaslightly inclined bedding mudstone landslide in the Tanshan Coal Mineformation mechanismnumerical simulationlimit equilibrium methodNingxia, China |
| spellingShingle | Jiaxin Zhong Zhengjun Mao Wankui Ni Jia Zhang Gaoyang Liu Jinge Zhang Mimi Geng Analysis of Formation Mechanism of Slightly Inclined Bedding Mudstone Landslide in Coal Mining Subsidence Area Based on Finite–Discrete Element Method Mathematics coal mining subsidence area slightly inclined bedding mudstone landslide in the Tanshan Coal Mine formation mechanism numerical simulation limit equilibrium method Ningxia, China |
| title | Analysis of Formation Mechanism of Slightly Inclined Bedding Mudstone Landslide in Coal Mining Subsidence Area Based on Finite–Discrete Element Method |
| title_full | Analysis of Formation Mechanism of Slightly Inclined Bedding Mudstone Landslide in Coal Mining Subsidence Area Based on Finite–Discrete Element Method |
| title_fullStr | Analysis of Formation Mechanism of Slightly Inclined Bedding Mudstone Landslide in Coal Mining Subsidence Area Based on Finite–Discrete Element Method |
| title_full_unstemmed | Analysis of Formation Mechanism of Slightly Inclined Bedding Mudstone Landslide in Coal Mining Subsidence Area Based on Finite–Discrete Element Method |
| title_short | Analysis of Formation Mechanism of Slightly Inclined Bedding Mudstone Landslide in Coal Mining Subsidence Area Based on Finite–Discrete Element Method |
| title_sort | analysis of formation mechanism of slightly inclined bedding mudstone landslide in coal mining subsidence area based on finite discrete element method |
| topic | coal mining subsidence area slightly inclined bedding mudstone landslide in the Tanshan Coal Mine formation mechanism numerical simulation limit equilibrium method Ningxia, China |
| url | https://www.mdpi.com/2227-7390/10/21/3995 |
| work_keys_str_mv | AT jiaxinzhong analysisofformationmechanismofslightlyinclinedbeddingmudstonelandslideincoalminingsubsidenceareabasedonfinitediscreteelementmethod AT zhengjunmao analysisofformationmechanismofslightlyinclinedbeddingmudstonelandslideincoalminingsubsidenceareabasedonfinitediscreteelementmethod AT wankuini analysisofformationmechanismofslightlyinclinedbeddingmudstonelandslideincoalminingsubsidenceareabasedonfinitediscreteelementmethod AT jiazhang analysisofformationmechanismofslightlyinclinedbeddingmudstonelandslideincoalminingsubsidenceareabasedonfinitediscreteelementmethod AT gaoyangliu analysisofformationmechanismofslightlyinclinedbeddingmudstonelandslideincoalminingsubsidenceareabasedonfinitediscreteelementmethod AT jingezhang analysisofformationmechanismofslightlyinclinedbeddingmudstonelandslideincoalminingsubsidenceareabasedonfinitediscreteelementmethod AT mimigeng analysisofformationmechanismofslightlyinclinedbeddingmudstonelandslideincoalminingsubsidenceareabasedonfinitediscreteelementmethod |