Research on a permeability model of coal damaged under triaxial loading and unloading
It is important to research permeability models to clarify the evolution of methane seepage from coal seams and to reduce the occurrence of gas accidents. However, existing permeability models do not fully account for the influences of effective stress and adsorption/desorption on the permeability o...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Bai, Xin [verfasserIn] Wang, Yan [verfasserIn] He, Guicheng [verfasserIn] Zhou, Zhuoli [verfasserIn] Wang, Dengke [verfasserIn] Zhang, Dongming [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2023 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Fuel - New York, NY [u.a.] : Elsevier, 1970, 354 |
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| Übergeordnetes Werk: |
volume:354 |
| DOI / URN: |
10.1016/j.fuel.2023.129375 |
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| Katalog-ID: |
ELV064895483 |
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| 245 | 1 | 0 | |a Research on a permeability model of coal damaged under triaxial loading and unloading |
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| 520 | |a It is important to research permeability models to clarify the evolution of methane seepage from coal seams and to reduce the occurrence of gas accidents. However, existing permeability models do not fully account for the influences of effective stress and adsorption/desorption on the permeability of coal rocks damaged during the three-dimensional stress loading and unloading process in coal mining. This study proposed a novel coal permeability model by more robustly considering the effects of stress and gas adsorption/desorption based on the generalized Hooke's law and Gibbs' equation. Then, a series of triaxial stress loading–unloading seepage experiments for coal rock were performed to validate the proposed model. The experimental research shows that triaxial stress loading and unloading have a significant effect on coal rock permeability. Before coal rock failure, the gas permeability shows a “V”-shaped development trend. After the deviatoric stress exceeds the compressive strength of the coal, the coal permeability increases sharply. Theoretical verification shows that the established exponential permeability model can effectively reflect not only the dynamic increase in the permeability of damaged coal under triaxial stress loading–unloading conditions but also the decrease in coal rock permeability during the increase in gas pressure with a constant effective stress. Moreover, the influence factors introduced in the permeability model can effectively reflect the influences of effective stress and gas adsorption/desorption on coal permeability under triaxial stress loading–unloading with different gas pressure conditions. These findings elucidate the variation in methane permeability of damaged coal rock under triaxial stress loading and unloading. The established permeability model can be used to carry out other numerical simulation studies to provide theoretical support for the prediction of gas permeability and efficient recovery of coalbed methane for coal mining working faces. | ||
| 650 | 4 | |a Coal rock | |
| 650 | 4 | |a Coalbed methane | |
| 650 | 4 | |a Permeability model | |
| 650 | 4 | |a Triaxial pressure loading and unloading | |
| 650 | 4 | |a Seepage law | |
| 700 | 1 | |a Wang, Yan |e verfasserin |4 aut | |
| 700 | 1 | |a He, Guicheng |e verfasserin |4 aut | |
| 700 | 1 | |a Zhou, Zhuoli |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Dengke |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Dongming |e verfasserin |4 aut | |
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10.1016/j.fuel.2023.129375 doi (DE-627)ELV064895483 (ELSEVIER)S0016-2361(23)01989-0 DE-627 ger DE-627 rda eng 660 VZ 58.21 bkl Bai, Xin verfasserin aut Research on a permeability model of coal damaged under triaxial loading and unloading 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier It is important to research permeability models to clarify the evolution of methane seepage from coal seams and to reduce the occurrence of gas accidents. However, existing permeability models do not fully account for the influences of effective stress and adsorption/desorption on the permeability of coal rocks damaged during the three-dimensional stress loading and unloading process in coal mining. This study proposed a novel coal permeability model by more robustly considering the effects of stress and gas adsorption/desorption based on the generalized Hooke's law and Gibbs' equation. Then, a series of triaxial stress loading–unloading seepage experiments for coal rock were performed to validate the proposed model. The experimental research shows that triaxial stress loading and unloading have a significant effect on coal rock permeability. Before coal rock failure, the gas permeability shows a “V”-shaped development trend. After the deviatoric stress exceeds the compressive strength of the coal, the coal permeability increases sharply. Theoretical verification shows that the established exponential permeability model can effectively reflect not only the dynamic increase in the permeability of damaged coal under triaxial stress loading–unloading conditions but also the decrease in coal rock permeability during the increase in gas pressure with a constant effective stress. Moreover, the influence factors introduced in the permeability model can effectively reflect the influences of effective stress and gas adsorption/desorption on coal permeability under triaxial stress loading–unloading with different gas pressure conditions. These findings elucidate the variation in methane permeability of damaged coal rock under triaxial stress loading and unloading. The established permeability model can be used to carry out other numerical simulation studies to provide theoretical support for the prediction of gas permeability and efficient recovery of coalbed methane for coal mining working faces. Coal rock Coalbed methane Permeability model Triaxial pressure loading and unloading Seepage law Wang, Yan verfasserin aut He, Guicheng verfasserin aut Zhou, Zhuoli verfasserin aut Wang, Dengke verfasserin aut Zhang, Dongming verfasserin aut Enthalten in Fuel New York, NY [u.a.] : Elsevier, 1970 354 Online-Ressource (DE-627)300898584 (DE-600)1483656-7 (DE-576)09555176X 0016-2361 nnns volume:354 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 58.21 Brennstoffe Kraftstoffe Explosivstoffe VZ AR 354 |
| spelling |
10.1016/j.fuel.2023.129375 doi (DE-627)ELV064895483 (ELSEVIER)S0016-2361(23)01989-0 DE-627 ger DE-627 rda eng 660 VZ 58.21 bkl Bai, Xin verfasserin aut Research on a permeability model of coal damaged under triaxial loading and unloading 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier It is important to research permeability models to clarify the evolution of methane seepage from coal seams and to reduce the occurrence of gas accidents. However, existing permeability models do not fully account for the influences of effective stress and adsorption/desorption on the permeability of coal rocks damaged during the three-dimensional stress loading and unloading process in coal mining. This study proposed a novel coal permeability model by more robustly considering the effects of stress and gas adsorption/desorption based on the generalized Hooke's law and Gibbs' equation. Then, a series of triaxial stress loading–unloading seepage experiments for coal rock were performed to validate the proposed model. The experimental research shows that triaxial stress loading and unloading have a significant effect on coal rock permeability. Before coal rock failure, the gas permeability shows a “V”-shaped development trend. After the deviatoric stress exceeds the compressive strength of the coal, the coal permeability increases sharply. Theoretical verification shows that the established exponential permeability model can effectively reflect not only the dynamic increase in the permeability of damaged coal under triaxial stress loading–unloading conditions but also the decrease in coal rock permeability during the increase in gas pressure with a constant effective stress. Moreover, the influence factors introduced in the permeability model can effectively reflect the influences of effective stress and gas adsorption/desorption on coal permeability under triaxial stress loading–unloading with different gas pressure conditions. These findings elucidate the variation in methane permeability of damaged coal rock under triaxial stress loading and unloading. The established permeability model can be used to carry out other numerical simulation studies to provide theoretical support for the prediction of gas permeability and efficient recovery of coalbed methane for coal mining working faces. Coal rock Coalbed methane Permeability model Triaxial pressure loading and unloading Seepage law Wang, Yan verfasserin aut He, Guicheng verfasserin aut Zhou, Zhuoli verfasserin aut Wang, Dengke verfasserin aut Zhang, Dongming verfasserin aut Enthalten in Fuel New York, NY [u.a.] : Elsevier, 1970 354 Online-Ressource (DE-627)300898584 (DE-600)1483656-7 (DE-576)09555176X 0016-2361 nnns volume:354 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 58.21 Brennstoffe Kraftstoffe Explosivstoffe VZ AR 354 |
| allfields_unstemmed |
10.1016/j.fuel.2023.129375 doi (DE-627)ELV064895483 (ELSEVIER)S0016-2361(23)01989-0 DE-627 ger DE-627 rda eng 660 VZ 58.21 bkl Bai, Xin verfasserin aut Research on a permeability model of coal damaged under triaxial loading and unloading 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier It is important to research permeability models to clarify the evolution of methane seepage from coal seams and to reduce the occurrence of gas accidents. However, existing permeability models do not fully account for the influences of effective stress and adsorption/desorption on the permeability of coal rocks damaged during the three-dimensional stress loading and unloading process in coal mining. This study proposed a novel coal permeability model by more robustly considering the effects of stress and gas adsorption/desorption based on the generalized Hooke's law and Gibbs' equation. Then, a series of triaxial stress loading–unloading seepage experiments for coal rock were performed to validate the proposed model. The experimental research shows that triaxial stress loading and unloading have a significant effect on coal rock permeability. Before coal rock failure, the gas permeability shows a “V”-shaped development trend. After the deviatoric stress exceeds the compressive strength of the coal, the coal permeability increases sharply. Theoretical verification shows that the established exponential permeability model can effectively reflect not only the dynamic increase in the permeability of damaged coal under triaxial stress loading–unloading conditions but also the decrease in coal rock permeability during the increase in gas pressure with a constant effective stress. Moreover, the influence factors introduced in the permeability model can effectively reflect the influences of effective stress and gas adsorption/desorption on coal permeability under triaxial stress loading–unloading with different gas pressure conditions. These findings elucidate the variation in methane permeability of damaged coal rock under triaxial stress loading and unloading. The established permeability model can be used to carry out other numerical simulation studies to provide theoretical support for the prediction of gas permeability and efficient recovery of coalbed methane for coal mining working faces. Coal rock Coalbed methane Permeability model Triaxial pressure loading and unloading Seepage law Wang, Yan verfasserin aut He, Guicheng verfasserin aut Zhou, Zhuoli verfasserin aut Wang, Dengke verfasserin aut Zhang, Dongming verfasserin aut Enthalten in Fuel New York, NY [u.a.] : Elsevier, 1970 354 Online-Ressource (DE-627)300898584 (DE-600)1483656-7 (DE-576)09555176X 0016-2361 nnns volume:354 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 58.21 Brennstoffe Kraftstoffe Explosivstoffe VZ AR 354 |
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10.1016/j.fuel.2023.129375 doi (DE-627)ELV064895483 (ELSEVIER)S0016-2361(23)01989-0 DE-627 ger DE-627 rda eng 660 VZ 58.21 bkl Bai, Xin verfasserin aut Research on a permeability model of coal damaged under triaxial loading and unloading 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier It is important to research permeability models to clarify the evolution of methane seepage from coal seams and to reduce the occurrence of gas accidents. However, existing permeability models do not fully account for the influences of effective stress and adsorption/desorption on the permeability of coal rocks damaged during the three-dimensional stress loading and unloading process in coal mining. This study proposed a novel coal permeability model by more robustly considering the effects of stress and gas adsorption/desorption based on the generalized Hooke's law and Gibbs' equation. Then, a series of triaxial stress loading–unloading seepage experiments for coal rock were performed to validate the proposed model. The experimental research shows that triaxial stress loading and unloading have a significant effect on coal rock permeability. Before coal rock failure, the gas permeability shows a “V”-shaped development trend. After the deviatoric stress exceeds the compressive strength of the coal, the coal permeability increases sharply. Theoretical verification shows that the established exponential permeability model can effectively reflect not only the dynamic increase in the permeability of damaged coal under triaxial stress loading–unloading conditions but also the decrease in coal rock permeability during the increase in gas pressure with a constant effective stress. Moreover, the influence factors introduced in the permeability model can effectively reflect the influences of effective stress and gas adsorption/desorption on coal permeability under triaxial stress loading–unloading with different gas pressure conditions. These findings elucidate the variation in methane permeability of damaged coal rock under triaxial stress loading and unloading. The established permeability model can be used to carry out other numerical simulation studies to provide theoretical support for the prediction of gas permeability and efficient recovery of coalbed methane for coal mining working faces. Coal rock Coalbed methane Permeability model Triaxial pressure loading and unloading Seepage law Wang, Yan verfasserin aut He, Guicheng verfasserin aut Zhou, Zhuoli verfasserin aut Wang, Dengke verfasserin aut Zhang, Dongming verfasserin aut Enthalten in Fuel New York, NY [u.a.] : Elsevier, 1970 354 Online-Ressource (DE-627)300898584 (DE-600)1483656-7 (DE-576)09555176X 0016-2361 nnns volume:354 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 58.21 Brennstoffe Kraftstoffe Explosivstoffe VZ AR 354 |
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10.1016/j.fuel.2023.129375 doi (DE-627)ELV064895483 (ELSEVIER)S0016-2361(23)01989-0 DE-627 ger DE-627 rda eng 660 VZ 58.21 bkl Bai, Xin verfasserin aut Research on a permeability model of coal damaged under triaxial loading and unloading 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier It is important to research permeability models to clarify the evolution of methane seepage from coal seams and to reduce the occurrence of gas accidents. However, existing permeability models do not fully account for the influences of effective stress and adsorption/desorption on the permeability of coal rocks damaged during the three-dimensional stress loading and unloading process in coal mining. This study proposed a novel coal permeability model by more robustly considering the effects of stress and gas adsorption/desorption based on the generalized Hooke's law and Gibbs' equation. Then, a series of triaxial stress loading–unloading seepage experiments for coal rock were performed to validate the proposed model. The experimental research shows that triaxial stress loading and unloading have a significant effect on coal rock permeability. Before coal rock failure, the gas permeability shows a “V”-shaped development trend. After the deviatoric stress exceeds the compressive strength of the coal, the coal permeability increases sharply. Theoretical verification shows that the established exponential permeability model can effectively reflect not only the dynamic increase in the permeability of damaged coal under triaxial stress loading–unloading conditions but also the decrease in coal rock permeability during the increase in gas pressure with a constant effective stress. Moreover, the influence factors introduced in the permeability model can effectively reflect the influences of effective stress and gas adsorption/desorption on coal permeability under triaxial stress loading–unloading with different gas pressure conditions. These findings elucidate the variation in methane permeability of damaged coal rock under triaxial stress loading and unloading. The established permeability model can be used to carry out other numerical simulation studies to provide theoretical support for the prediction of gas permeability and efficient recovery of coalbed methane for coal mining working faces. Coal rock Coalbed methane Permeability model Triaxial pressure loading and unloading Seepage law Wang, Yan verfasserin aut He, Guicheng verfasserin aut Zhou, Zhuoli verfasserin aut Wang, Dengke verfasserin aut Zhang, Dongming verfasserin aut Enthalten in Fuel New York, NY [u.a.] : Elsevier, 1970 354 Online-Ressource (DE-627)300898584 (DE-600)1483656-7 (DE-576)09555176X 0016-2361 nnns volume:354 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 58.21 Brennstoffe Kraftstoffe Explosivstoffe VZ AR 354 |
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Enthalten in Fuel 354 volume:354 |
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Coal rock Coalbed methane Permeability model Triaxial pressure loading and unloading Seepage law |
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Bai, Xin @@aut@@ Wang, Yan @@aut@@ He, Guicheng @@aut@@ Zhou, Zhuoli @@aut@@ Wang, Dengke @@aut@@ Zhang, Dongming @@aut@@ |
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2023-01-01T00:00:00Z |
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Bai, Xin |
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Bai, Xin ddc 660 bkl 58.21 misc Coal rock misc Coalbed methane misc Permeability model misc Triaxial pressure loading and unloading misc Seepage law Research on a permeability model of coal damaged under triaxial loading and unloading |
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660 VZ 58.21 bkl Research on a permeability model of coal damaged under triaxial loading and unloading Coal rock Coalbed methane Permeability model Triaxial pressure loading and unloading Seepage law |
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ddc 660 bkl 58.21 misc Coal rock misc Coalbed methane misc Permeability model misc Triaxial pressure loading and unloading misc Seepage law |
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ddc 660 bkl 58.21 misc Coal rock misc Coalbed methane misc Permeability model misc Triaxial pressure loading and unloading misc Seepage law |
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ddc 660 bkl 58.21 misc Coal rock misc Coalbed methane misc Permeability model misc Triaxial pressure loading and unloading misc Seepage law |
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Research on a permeability model of coal damaged under triaxial loading and unloading |
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Bai, Xin Wang, Yan He, Guicheng Zhou, Zhuoli Wang, Dengke Zhang, Dongming |
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research on a permeability model of coal damaged under triaxial loading and unloading |
| title_auth |
Research on a permeability model of coal damaged under triaxial loading and unloading |
| abstract |
It is important to research permeability models to clarify the evolution of methane seepage from coal seams and to reduce the occurrence of gas accidents. However, existing permeability models do not fully account for the influences of effective stress and adsorption/desorption on the permeability of coal rocks damaged during the three-dimensional stress loading and unloading process in coal mining. This study proposed a novel coal permeability model by more robustly considering the effects of stress and gas adsorption/desorption based on the generalized Hooke's law and Gibbs' equation. Then, a series of triaxial stress loading–unloading seepage experiments for coal rock were performed to validate the proposed model. The experimental research shows that triaxial stress loading and unloading have a significant effect on coal rock permeability. Before coal rock failure, the gas permeability shows a “V”-shaped development trend. After the deviatoric stress exceeds the compressive strength of the coal, the coal permeability increases sharply. Theoretical verification shows that the established exponential permeability model can effectively reflect not only the dynamic increase in the permeability of damaged coal under triaxial stress loading–unloading conditions but also the decrease in coal rock permeability during the increase in gas pressure with a constant effective stress. Moreover, the influence factors introduced in the permeability model can effectively reflect the influences of effective stress and gas adsorption/desorption on coal permeability under triaxial stress loading–unloading with different gas pressure conditions. These findings elucidate the variation in methane permeability of damaged coal rock under triaxial stress loading and unloading. The established permeability model can be used to carry out other numerical simulation studies to provide theoretical support for the prediction of gas permeability and efficient recovery of coalbed methane for coal mining working faces. |
| abstractGer |
It is important to research permeability models to clarify the evolution of methane seepage from coal seams and to reduce the occurrence of gas accidents. However, existing permeability models do not fully account for the influences of effective stress and adsorption/desorption on the permeability of coal rocks damaged during the three-dimensional stress loading and unloading process in coal mining. This study proposed a novel coal permeability model by more robustly considering the effects of stress and gas adsorption/desorption based on the generalized Hooke's law and Gibbs' equation. Then, a series of triaxial stress loading–unloading seepage experiments for coal rock were performed to validate the proposed model. The experimental research shows that triaxial stress loading and unloading have a significant effect on coal rock permeability. Before coal rock failure, the gas permeability shows a “V”-shaped development trend. After the deviatoric stress exceeds the compressive strength of the coal, the coal permeability increases sharply. Theoretical verification shows that the established exponential permeability model can effectively reflect not only the dynamic increase in the permeability of damaged coal under triaxial stress loading–unloading conditions but also the decrease in coal rock permeability during the increase in gas pressure with a constant effective stress. Moreover, the influence factors introduced in the permeability model can effectively reflect the influences of effective stress and gas adsorption/desorption on coal permeability under triaxial stress loading–unloading with different gas pressure conditions. These findings elucidate the variation in methane permeability of damaged coal rock under triaxial stress loading and unloading. The established permeability model can be used to carry out other numerical simulation studies to provide theoretical support for the prediction of gas permeability and efficient recovery of coalbed methane for coal mining working faces. |
| abstract_unstemmed |
It is important to research permeability models to clarify the evolution of methane seepage from coal seams and to reduce the occurrence of gas accidents. However, existing permeability models do not fully account for the influences of effective stress and adsorption/desorption on the permeability of coal rocks damaged during the three-dimensional stress loading and unloading process in coal mining. This study proposed a novel coal permeability model by more robustly considering the effects of stress and gas adsorption/desorption based on the generalized Hooke's law and Gibbs' equation. Then, a series of triaxial stress loading–unloading seepage experiments for coal rock were performed to validate the proposed model. The experimental research shows that triaxial stress loading and unloading have a significant effect on coal rock permeability. Before coal rock failure, the gas permeability shows a “V”-shaped development trend. After the deviatoric stress exceeds the compressive strength of the coal, the coal permeability increases sharply. Theoretical verification shows that the established exponential permeability model can effectively reflect not only the dynamic increase in the permeability of damaged coal under triaxial stress loading–unloading conditions but also the decrease in coal rock permeability during the increase in gas pressure with a constant effective stress. Moreover, the influence factors introduced in the permeability model can effectively reflect the influences of effective stress and gas adsorption/desorption on coal permeability under triaxial stress loading–unloading with different gas pressure conditions. These findings elucidate the variation in methane permeability of damaged coal rock under triaxial stress loading and unloading. The established permeability model can be used to carry out other numerical simulation studies to provide theoretical support for the prediction of gas permeability and efficient recovery of coalbed methane for coal mining working faces. |
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Research on a permeability model of coal damaged under triaxial loading and unloading |
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| score |
7.4021606 |