Safety evaluation method of bottom coal thickness in thick coal seam roadway
Abstract In recent years, the number of roadway floor rock burst accidents is increasing, which seriously restricts the safe production of the mine. Therefore, safety evaluation method of bottom coal thickness in thick coal seam roadway was studied. The research results shown that the stress concent...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-06-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-65708-8 |
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| author | Yunliang Tan Shilin Song Xiufeng Zhang Xuesheng Liu |
| author_facet | Yunliang Tan Shilin Song Xiufeng Zhang Xuesheng Liu |
| author_sort | Yunliang Tan |
| collection | DOAJ |
| description | Abstract In recent years, the number of roadway floor rock burst accidents is increasing, which seriously restricts the safe production of the mine. Therefore, safety evaluation method of bottom coal thickness in thick coal seam roadway was studied. The research results shown that the stress concentration area of composite floor is distributed in coal seam or rock stratum with large elastic modulus. With the increase of floor rock strength, the stress of coal-rock composite floor increased gradually, but the displacement and energy decreased gradually. When floor rock strength was equal to bottom coal strength, the increase of floor stress and displacement with the change of bottom coal thickness was the smallest, which was 34.29% and 33.61% respectively. The elastic strain energy decreased from 14.58 to 9.85%. With the increase of bottom coal thickness, the stress and displacement of coal-rock composite floor increased first and then decreased, and the elastic strain energy decreased gradually. It puts forward the safety evaluation method of bottom coal thickness: floor failure depth → reasonable thickness of bottom coal → safety thickness of bottom coal. It can provide reference for design of roadway bottom coal retention and surrounding rock control in thick coal seam face. |
| format | Article |
| id | doaj-art-9137b4d223cd43928872aaad36bc3b81 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2024-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-9137b4d223cd43928872aaad36bc3b812025-01-26T12:34:55ZengNature PortfolioScientific Reports2045-23222024-06-0114111410.1038/s41598-024-65708-8Safety evaluation method of bottom coal thickness in thick coal seam roadwayYunliang Tan0Shilin Song1Xiufeng Zhang2Xuesheng Liu3College of Energy and Mining Engineering, Shandong University of Science and TechnologyCollege of Energy and Mining Engineering, Shandong University of Science and TechnologyShandong Energy Grp Co LtdCollege of Energy and Mining Engineering, Shandong University of Science and TechnologyAbstract In recent years, the number of roadway floor rock burst accidents is increasing, which seriously restricts the safe production of the mine. Therefore, safety evaluation method of bottom coal thickness in thick coal seam roadway was studied. The research results shown that the stress concentration area of composite floor is distributed in coal seam or rock stratum with large elastic modulus. With the increase of floor rock strength, the stress of coal-rock composite floor increased gradually, but the displacement and energy decreased gradually. When floor rock strength was equal to bottom coal strength, the increase of floor stress and displacement with the change of bottom coal thickness was the smallest, which was 34.29% and 33.61% respectively. The elastic strain energy decreased from 14.58 to 9.85%. With the increase of bottom coal thickness, the stress and displacement of coal-rock composite floor increased first and then decreased, and the elastic strain energy decreased gradually. It puts forward the safety evaluation method of bottom coal thickness: floor failure depth → reasonable thickness of bottom coal → safety thickness of bottom coal. It can provide reference for design of roadway bottom coal retention and surrounding rock control in thick coal seam face.https://doi.org/10.1038/s41598-024-65708-8The floor strengthThe bottom coal thicknessSafety evaluation |
| spellingShingle | Yunliang Tan Shilin Song Xiufeng Zhang Xuesheng Liu Safety evaluation method of bottom coal thickness in thick coal seam roadway Scientific Reports The floor strength The bottom coal thickness Safety evaluation |
| title | Safety evaluation method of bottom coal thickness in thick coal seam roadway |
| title_full | Safety evaluation method of bottom coal thickness in thick coal seam roadway |
| title_fullStr | Safety evaluation method of bottom coal thickness in thick coal seam roadway |
| title_full_unstemmed | Safety evaluation method of bottom coal thickness in thick coal seam roadway |
| title_short | Safety evaluation method of bottom coal thickness in thick coal seam roadway |
| title_sort | safety evaluation method of bottom coal thickness in thick coal seam roadway |
| topic | The floor strength The bottom coal thickness Safety evaluation |
| url | https://doi.org/10.1038/s41598-024-65708-8 |
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