Study on dynamic compression characteristics of coal containing gas under different strain rates
Abstract To investigate the dynamic compression properties and crushing features of gas-containing coal under complex geological environments, a dynamic and static combined loading test system was independently developed for conducting triaxial dynamic compression tests. The dynamic stress-strain cu...
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-84005-y |
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| author | Xin Gao Sheng Xue Tu Qingyi |
| author_facet | Xin Gao Sheng Xue Tu Qingyi |
| author_sort | Xin Gao |
| collection | DOAJ |
| description | Abstract To investigate the dynamic compression properties and crushing features of gas-containing coal under complex geological environments, a dynamic and static combined loading test system was independently developed for conducting triaxial dynamic compression tests. The dynamic stress-strain curves under different strain rates were analyzed to study the effects of strain rate and gas pressure on the dynamic mechanical characteristics. Crushed coal samples were sieved and analyzed using a standard sieve and fractal theory. The study reveals that strain rate and gas pressure significantly influence the plastic deformation stage of the dynamic stress-strain curve of gas-containing coal. Under high strain rates, low gas pressure lengthens the plastic deformation stage, while high gas pressure shortens this stage and enhances brittleness. Increased strain rates lead to higher peak stress and peak strain in gas-containing coal samples. As gas pressure increases, the dynamic peak stress decreases, and the peak strain initially increases and then decreases. The damage form of gas-containing coal is primarily tensile-shear, accompanied by crushing damage. The fractal dimension increases at higher gas pressures and strain rates but stabilizes at gas pressures greater than 0.7 MPa. These findings enhance the understanding of the dynamic behavior of gas-containing coal under triaxial loading and provide valuable insights for the prevention and control of dynamic hazards in gas-containing coal bodies under complex stress environments. |
| format | Article |
| id | doaj-art-fe121361ed444615b65586bc01494cc5 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-fe121361ed444615b65586bc01494cc52025-01-05T12:21:29ZengNature PortfolioScientific Reports2045-23222025-01-0115111510.1038/s41598-024-84005-yStudy on dynamic compression characteristics of coal containing gas under different strain ratesXin Gao0Sheng Xue1Tu Qingyi2School of Safety Science and Engineering, Anhui University of Science and TechnologySchool of Safety Science and Engineering, Anhui University of Science and TechnologyState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and TechnologyAbstract To investigate the dynamic compression properties and crushing features of gas-containing coal under complex geological environments, a dynamic and static combined loading test system was independently developed for conducting triaxial dynamic compression tests. The dynamic stress-strain curves under different strain rates were analyzed to study the effects of strain rate and gas pressure on the dynamic mechanical characteristics. Crushed coal samples were sieved and analyzed using a standard sieve and fractal theory. The study reveals that strain rate and gas pressure significantly influence the plastic deformation stage of the dynamic stress-strain curve of gas-containing coal. Under high strain rates, low gas pressure lengthens the plastic deformation stage, while high gas pressure shortens this stage and enhances brittleness. Increased strain rates lead to higher peak stress and peak strain in gas-containing coal samples. As gas pressure increases, the dynamic peak stress decreases, and the peak strain initially increases and then decreases. The damage form of gas-containing coal is primarily tensile-shear, accompanied by crushing damage. The fractal dimension increases at higher gas pressures and strain rates but stabilizes at gas pressures greater than 0.7 MPa. These findings enhance the understanding of the dynamic behavior of gas-containing coal under triaxial loading and provide valuable insights for the prevention and control of dynamic hazards in gas-containing coal bodies under complex stress environments.https://doi.org/10.1038/s41598-024-84005-yThree-axis dynamic compressionGas-containing coalStrain rateMechanical characteristicFractal dimension (math.) |
| spellingShingle | Xin Gao Sheng Xue Tu Qingyi Study on dynamic compression characteristics of coal containing gas under different strain rates Scientific Reports Three-axis dynamic compression Gas-containing coal Strain rate Mechanical characteristic Fractal dimension (math.) |
| title | Study on dynamic compression characteristics of coal containing gas under different strain rates |
| title_full | Study on dynamic compression characteristics of coal containing gas under different strain rates |
| title_fullStr | Study on dynamic compression characteristics of coal containing gas under different strain rates |
| title_full_unstemmed | Study on dynamic compression characteristics of coal containing gas under different strain rates |
| title_short | Study on dynamic compression characteristics of coal containing gas under different strain rates |
| title_sort | study on dynamic compression characteristics of coal containing gas under different strain rates |
| topic | Three-axis dynamic compression Gas-containing coal Strain rate Mechanical characteristic Fractal dimension (math.) |
| url | https://doi.org/10.1038/s41598-024-84005-y |
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