Structural Characteristics Analysis of Overlying Rocks and Prevention Measures with a Long-Wall Face Passing Across Abandoned Roadways: A Case Study
In order to study the occurrence mechanism of advanced coal pillar instability failure and support crushing accidents during a long-wall face passing across abandoned roadways period, the Panel LW3101 in Shenghua Colliery was taken as a typical engineering background. By means of in situ investigati...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/6665341 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832560285863378944 |
|---|---|
| author | Zeng-Qiang Yang Chang Liu Guo-An Wang Gang-Wei Li Feng-Shuo Li |
| author_facet | Zeng-Qiang Yang Chang Liu Guo-An Wang Gang-Wei Li Feng-Shuo Li |
| author_sort | Zeng-Qiang Yang |
| collection | DOAJ |
| description | In order to study the occurrence mechanism of advanced coal pillar instability failure and support crushing accidents during a long-wall face passing across abandoned roadways period, the Panel LW3101 in Shenghua Colliery was taken as a typical engineering background. By means of in situ investigation, physical simulation experiment, theoretical analysis, in situ tests, and relevant monitoring methods, the occurrence mechanism and prevention measures are studied. The results show that the bearing stress in advanced coal pillar is accumulated larger and larger with the width of advanced coal pillar gradually decreasing, and meanwhile, the key stratum in overlying strata would also be sliding instability under some minimum critical width condition; the sudden failure of advanced coal pillar which leads to a sharp increase of bending moment is the key factor that induces fracture of the main roof in front of long-wall face, and the advanced fracture of the main roof can be prevented by changing the stress state of the advanced coal pillar from a two-dimensional state to a three-dimensional state; the method of backfilling abandoned roadway is used to improve the stability of advanced coal pillar and the corresponding monitoring results verify that this method is effective. The research conclusions provide a theoretical foundation and new guidance for preventing advanced coal pillar instability failure and support crushing accidents under a long-wall face passing across abandoned roadways condition. |
| format | Article |
| id | doaj-art-dc625e9e8ba94bd7a8f5955fd30e0286 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-dc625e9e8ba94bd7a8f5955fd30e02862025-02-03T01:27:59ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/66653416665341Structural Characteristics Analysis of Overlying Rocks and Prevention Measures with a Long-Wall Face Passing Across Abandoned Roadways: A Case StudyZeng-Qiang Yang0Chang Liu1Guo-An Wang2Gang-Wei Li3Feng-Shuo Li4School of Transportation Engineering, Jiangsu Vocational Institute of Architectural Technology, Xuzhou 221116, Jiangsu, ChinaScience & Technology Innovation Center, Coal Mining and Designing Department, Tiandi Science & Technology Co., Ltd., Beijing 100013, ChinaSchool of Transportation Engineering, Jiangsu Vocational Institute of Architectural Technology, Xuzhou 221116, Jiangsu, ChinaState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, ChinaSchool of Transportation Engineering, Jiangsu Vocational Institute of Architectural Technology, Xuzhou 221116, Jiangsu, ChinaIn order to study the occurrence mechanism of advanced coal pillar instability failure and support crushing accidents during a long-wall face passing across abandoned roadways period, the Panel LW3101 in Shenghua Colliery was taken as a typical engineering background. By means of in situ investigation, physical simulation experiment, theoretical analysis, in situ tests, and relevant monitoring methods, the occurrence mechanism and prevention measures are studied. The results show that the bearing stress in advanced coal pillar is accumulated larger and larger with the width of advanced coal pillar gradually decreasing, and meanwhile, the key stratum in overlying strata would also be sliding instability under some minimum critical width condition; the sudden failure of advanced coal pillar which leads to a sharp increase of bending moment is the key factor that induces fracture of the main roof in front of long-wall face, and the advanced fracture of the main roof can be prevented by changing the stress state of the advanced coal pillar from a two-dimensional state to a three-dimensional state; the method of backfilling abandoned roadway is used to improve the stability of advanced coal pillar and the corresponding monitoring results verify that this method is effective. The research conclusions provide a theoretical foundation and new guidance for preventing advanced coal pillar instability failure and support crushing accidents under a long-wall face passing across abandoned roadways condition.http://dx.doi.org/10.1155/2021/6665341 |
| spellingShingle | Zeng-Qiang Yang Chang Liu Guo-An Wang Gang-Wei Li Feng-Shuo Li Structural Characteristics Analysis of Overlying Rocks and Prevention Measures with a Long-Wall Face Passing Across Abandoned Roadways: A Case Study Shock and Vibration |
| title | Structural Characteristics Analysis of Overlying Rocks and Prevention Measures with a Long-Wall Face Passing Across Abandoned Roadways: A Case Study |
| title_full | Structural Characteristics Analysis of Overlying Rocks and Prevention Measures with a Long-Wall Face Passing Across Abandoned Roadways: A Case Study |
| title_fullStr | Structural Characteristics Analysis of Overlying Rocks and Prevention Measures with a Long-Wall Face Passing Across Abandoned Roadways: A Case Study |
| title_full_unstemmed | Structural Characteristics Analysis of Overlying Rocks and Prevention Measures with a Long-Wall Face Passing Across Abandoned Roadways: A Case Study |
| title_short | Structural Characteristics Analysis of Overlying Rocks and Prevention Measures with a Long-Wall Face Passing Across Abandoned Roadways: A Case Study |
| title_sort | structural characteristics analysis of overlying rocks and prevention measures with a long wall face passing across abandoned roadways a case study |
| url | http://dx.doi.org/10.1155/2021/6665341 |
| work_keys_str_mv | AT zengqiangyang structuralcharacteristicsanalysisofoverlyingrocksandpreventionmeasureswithalongwallfacepassingacrossabandonedroadwaysacasestudy AT changliu structuralcharacteristicsanalysisofoverlyingrocksandpreventionmeasureswithalongwallfacepassingacrossabandonedroadwaysacasestudy AT guoanwang structuralcharacteristicsanalysisofoverlyingrocksandpreventionmeasureswithalongwallfacepassingacrossabandonedroadwaysacasestudy AT gangweili structuralcharacteristicsanalysisofoverlyingrocksandpreventionmeasureswithalongwallfacepassingacrossabandonedroadwaysacasestudy AT fengshuoli structuralcharacteristicsanalysisofoverlyingrocksandpreventionmeasureswithalongwallfacepassingacrossabandonedroadwaysacasestudy |