Rock burst mechanism induced by stress anomaly in roof thickness variation zone: a case study

The variation of hard roof thickness is an essential contributor in triggering rock bursts during longwall mining. Case analysis and numerical modeling were used to study the stress and energy characteristics of the coal and rock mass and its fracture behaviour in the roof thickness variation zone (RTVZ). The results show that the coal seam has higher initial stress if overlain by a thicker hard roof, whose stress monitoring value is 1.8–2.6 times that of the thin zone. The increasing variation in the roof thickness or the roof properties causes a greater initial stress change in the coal seam. In the thick roof zones, the superposition of the advanced abutment pressure and the increased initial stress will result in a high-stress concentration area, where the stress mutation coefficient value can be up to 1.08–1.15. A higher rock burst risk might thus present in the roadway near the longwall in the thick roof zone, where more intensive elastic energy was released in the coal/rock mass. Also, it is more likely to have a significant dynamic load in the thin roof zone due to the higher possibility of roof breakage, and the total microseismic energy can reach 1.8–3.2E + 08J. HighlightsCase analysis and numerical modelling were used to study the formation mechanism of stress anomaly in coal seams, energy evolution characteristics of the coal/rock mass and its fracture behaviour in the RTVZ.The mechanism of rock bursts induced by coal mining in the RTVZ is determined. The thick roof zone has high-stress concentration, where more intensive elastic energy is released in the coal/rock mass. Due to easier roof breakage, it is more likely to have a significant dynamic load in the thin roof zone.The prevention and control method of rock bursts in the RTVZ is put forward. The rock bursts can be relieved by reducing the initial stress increased in the thick roof zone. Strengthening roadway support can reduce the influence of dynamic load on the roadway. Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Xianxi Bai [verfasserIn] Anye Cao [verfasserIn] Wu Cai [verfasserIn] Yingyuan Wen [verfasserIn] Yaoqi Liu [verfasserIn] Songwei Wang [verfasserIn] Xuwei Li [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2022

Schlagwörter:	Roof thickness variation rock burst mechanism numerical modeling case analysis

Übergeordnetes Werk:	In: Geomatics, Natural Hazards & Risk - Taylor & Francis Group, 2016, 13(2022), 1, Seite 1805-1830
Übergeordnetes Werk:	volume:13 ; year:2022 ; number:1 ; pages:1805-1830

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc Journal toc

DOI / URN:	10.1080/19475705.2022.2100832

Katalog-ID:	DOAJ036755818

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520			\|a The variation of hard roof thickness is an essential contributor in triggering rock bursts during longwall mining. Case analysis and numerical modeling were used to study the stress and energy characteristics of the coal and rock mass and its fracture behaviour in the roof thickness variation zone (RTVZ). The results show that the coal seam has higher initial stress if overlain by a thicker hard roof, whose stress monitoring value is 1.8–2.6 times that of the thin zone. The increasing variation in the roof thickness or the roof properties causes a greater initial stress change in the coal seam. In the thick roof zones, the superposition of the advanced abutment pressure and the increased initial stress will result in a high-stress concentration area, where the stress mutation coefficient value can be up to 1.08–1.15. A higher rock burst risk might thus present in the roadway near the longwall in the thick roof zone, where more intensive elastic energy was released in the coal/rock mass. Also, it is more likely to have a significant dynamic load in the thin roof zone due to the higher possibility of roof breakage, and the total microseismic energy can reach 1.8–3.2E + 08J. HighlightsCase analysis and numerical modelling were used to study the formation mechanism of stress anomaly in coal seams, energy evolution characteristics of the coal/rock mass and its fracture behaviour in the RTVZ.The mechanism of rock bursts induced by coal mining in the RTVZ is determined. The thick roof zone has high-stress concentration, where more intensive elastic energy is released in the coal/rock mass. Due to easier roof breakage, it is more likely to have a significant dynamic load in the thin roof zone.The prevention and control method of rock bursts in the RTVZ is put forward. The rock bursts can be relieved by reducing the initial stress increased in the thick roof zone. Strengthening roadway support can reduce the influence of dynamic load on the roadway.
650		4	\|a Roof thickness variation
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allfields	10.1080/19475705.2022.2100832 doi (DE-627)DOAJ036755818 (DE-599)DOAJffb53488243644a9b515e15528c4cb2d DE-627 ger DE-627 rakwb eng TD1-1066 GE1-350 Xianxi Bai verfasserin aut Rock burst mechanism induced by stress anomaly in roof thickness variation zone: a case study 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The variation of hard roof thickness is an essential contributor in triggering rock bursts during longwall mining. Case analysis and numerical modeling were used to study the stress and energy characteristics of the coal and rock mass and its fracture behaviour in the roof thickness variation zone (RTVZ). The results show that the coal seam has higher initial stress if overlain by a thicker hard roof, whose stress monitoring value is 1.8–2.6 times that of the thin zone. The increasing variation in the roof thickness or the roof properties causes a greater initial stress change in the coal seam. In the thick roof zones, the superposition of the advanced abutment pressure and the increased initial stress will result in a high-stress concentration area, where the stress mutation coefficient value can be up to 1.08–1.15. A higher rock burst risk might thus present in the roadway near the longwall in the thick roof zone, where more intensive elastic energy was released in the coal/rock mass. Also, it is more likely to have a significant dynamic load in the thin roof zone due to the higher possibility of roof breakage, and the total microseismic energy can reach 1.8–3.2E + 08J. HighlightsCase analysis and numerical modelling were used to study the formation mechanism of stress anomaly in coal seams, energy evolution characteristics of the coal/rock mass and its fracture behaviour in the RTVZ.The mechanism of rock bursts induced by coal mining in the RTVZ is determined. The thick roof zone has high-stress concentration, where more intensive elastic energy is released in the coal/rock mass. Due to easier roof breakage, it is more likely to have a significant dynamic load in the thin roof zone.The prevention and control method of rock bursts in the RTVZ is put forward. The rock bursts can be relieved by reducing the initial stress increased in the thick roof zone. Strengthening roadway support can reduce the influence of dynamic load on the roadway. Roof thickness variation rock burst mechanism numerical modeling case analysis Environmental technology. Sanitary engineering Environmental sciences Risk in industry. Risk management HD61 Anye Cao verfasserin aut Wu Cai verfasserin aut Yingyuan Wen verfasserin aut Yaoqi Liu verfasserin aut Songwei Wang verfasserin aut Xuwei Li verfasserin aut In Geomatics, Natural Hazards & Risk Taylor & Francis Group, 2016 13(2022), 1, Seite 1805-1830 (DE-627)626457491 (DE-600)2553648-5 19475713 nnns volume:13 year:2022 number:1 pages:1805-1830 https://doi.org/10.1080/19475705.2022.2100832 kostenfrei https://doaj.org/article/ffb53488243644a9b515e15528c4cb2d kostenfrei https://www.tandfonline.com/doi/10.1080/19475705.2022.2100832 kostenfrei https://doaj.org/toc/1947-5705 Journal toc kostenfrei https://doaj.org/toc/1947-5713 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2022 1 1805-1830
spelling	10.1080/19475705.2022.2100832 doi (DE-627)DOAJ036755818 (DE-599)DOAJffb53488243644a9b515e15528c4cb2d DE-627 ger DE-627 rakwb eng TD1-1066 GE1-350 Xianxi Bai verfasserin aut Rock burst mechanism induced by stress anomaly in roof thickness variation zone: a case study 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The variation of hard roof thickness is an essential contributor in triggering rock bursts during longwall mining. Case analysis and numerical modeling were used to study the stress and energy characteristics of the coal and rock mass and its fracture behaviour in the roof thickness variation zone (RTVZ). The results show that the coal seam has higher initial stress if overlain by a thicker hard roof, whose stress monitoring value is 1.8–2.6 times that of the thin zone. The increasing variation in the roof thickness or the roof properties causes a greater initial stress change in the coal seam. In the thick roof zones, the superposition of the advanced abutment pressure and the increased initial stress will result in a high-stress concentration area, where the stress mutation coefficient value can be up to 1.08–1.15. A higher rock burst risk might thus present in the roadway near the longwall in the thick roof zone, where more intensive elastic energy was released in the coal/rock mass. Also, it is more likely to have a significant dynamic load in the thin roof zone due to the higher possibility of roof breakage, and the total microseismic energy can reach 1.8–3.2E + 08J. HighlightsCase analysis and numerical modelling were used to study the formation mechanism of stress anomaly in coal seams, energy evolution characteristics of the coal/rock mass and its fracture behaviour in the RTVZ.The mechanism of rock bursts induced by coal mining in the RTVZ is determined. The thick roof zone has high-stress concentration, where more intensive elastic energy is released in the coal/rock mass. Due to easier roof breakage, it is more likely to have a significant dynamic load in the thin roof zone.The prevention and control method of rock bursts in the RTVZ is put forward. The rock bursts can be relieved by reducing the initial stress increased in the thick roof zone. Strengthening roadway support can reduce the influence of dynamic load on the roadway. Roof thickness variation rock burst mechanism numerical modeling case analysis Environmental technology. Sanitary engineering Environmental sciences Risk in industry. Risk management HD61 Anye Cao verfasserin aut Wu Cai verfasserin aut Yingyuan Wen verfasserin aut Yaoqi Liu verfasserin aut Songwei Wang verfasserin aut Xuwei Li verfasserin aut In Geomatics, Natural Hazards & Risk Taylor & Francis Group, 2016 13(2022), 1, Seite 1805-1830 (DE-627)626457491 (DE-600)2553648-5 19475713 nnns volume:13 year:2022 number:1 pages:1805-1830 https://doi.org/10.1080/19475705.2022.2100832 kostenfrei https://doaj.org/article/ffb53488243644a9b515e15528c4cb2d kostenfrei https://www.tandfonline.com/doi/10.1080/19475705.2022.2100832 kostenfrei https://doaj.org/toc/1947-5705 Journal toc kostenfrei https://doaj.org/toc/1947-5713 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2022 1 1805-1830
allfields_unstemmed	10.1080/19475705.2022.2100832 doi (DE-627)DOAJ036755818 (DE-599)DOAJffb53488243644a9b515e15528c4cb2d DE-627 ger DE-627 rakwb eng TD1-1066 GE1-350 Xianxi Bai verfasserin aut Rock burst mechanism induced by stress anomaly in roof thickness variation zone: a case study 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The variation of hard roof thickness is an essential contributor in triggering rock bursts during longwall mining. Case analysis and numerical modeling were used to study the stress and energy characteristics of the coal and rock mass and its fracture behaviour in the roof thickness variation zone (RTVZ). The results show that the coal seam has higher initial stress if overlain by a thicker hard roof, whose stress monitoring value is 1.8–2.6 times that of the thin zone. The increasing variation in the roof thickness or the roof properties causes a greater initial stress change in the coal seam. In the thick roof zones, the superposition of the advanced abutment pressure and the increased initial stress will result in a high-stress concentration area, where the stress mutation coefficient value can be up to 1.08–1.15. A higher rock burst risk might thus present in the roadway near the longwall in the thick roof zone, where more intensive elastic energy was released in the coal/rock mass. Also, it is more likely to have a significant dynamic load in the thin roof zone due to the higher possibility of roof breakage, and the total microseismic energy can reach 1.8–3.2E + 08J. HighlightsCase analysis and numerical modelling were used to study the formation mechanism of stress anomaly in coal seams, energy evolution characteristics of the coal/rock mass and its fracture behaviour in the RTVZ.The mechanism of rock bursts induced by coal mining in the RTVZ is determined. The thick roof zone has high-stress concentration, where more intensive elastic energy is released in the coal/rock mass. Due to easier roof breakage, it is more likely to have a significant dynamic load in the thin roof zone.The prevention and control method of rock bursts in the RTVZ is put forward. The rock bursts can be relieved by reducing the initial stress increased in the thick roof zone. Strengthening roadway support can reduce the influence of dynamic load on the roadway. Roof thickness variation rock burst mechanism numerical modeling case analysis Environmental technology. Sanitary engineering Environmental sciences Risk in industry. Risk management HD61 Anye Cao verfasserin aut Wu Cai verfasserin aut Yingyuan Wen verfasserin aut Yaoqi Liu verfasserin aut Songwei Wang verfasserin aut Xuwei Li verfasserin aut In Geomatics, Natural Hazards & Risk Taylor & Francis Group, 2016 13(2022), 1, Seite 1805-1830 (DE-627)626457491 (DE-600)2553648-5 19475713 nnns volume:13 year:2022 number:1 pages:1805-1830 https://doi.org/10.1080/19475705.2022.2100832 kostenfrei https://doaj.org/article/ffb53488243644a9b515e15528c4cb2d kostenfrei https://www.tandfonline.com/doi/10.1080/19475705.2022.2100832 kostenfrei https://doaj.org/toc/1947-5705 Journal toc kostenfrei https://doaj.org/toc/1947-5713 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2022 1 1805-1830
allfieldsGer	10.1080/19475705.2022.2100832 doi (DE-627)DOAJ036755818 (DE-599)DOAJffb53488243644a9b515e15528c4cb2d DE-627 ger DE-627 rakwb eng TD1-1066 GE1-350 Xianxi Bai verfasserin aut Rock burst mechanism induced by stress anomaly in roof thickness variation zone: a case study 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The variation of hard roof thickness is an essential contributor in triggering rock bursts during longwall mining. Case analysis and numerical modeling were used to study the stress and energy characteristics of the coal and rock mass and its fracture behaviour in the roof thickness variation zone (RTVZ). The results show that the coal seam has higher initial stress if overlain by a thicker hard roof, whose stress monitoring value is 1.8–2.6 times that of the thin zone. The increasing variation in the roof thickness or the roof properties causes a greater initial stress change in the coal seam. In the thick roof zones, the superposition of the advanced abutment pressure and the increased initial stress will result in a high-stress concentration area, where the stress mutation coefficient value can be up to 1.08–1.15. A higher rock burst risk might thus present in the roadway near the longwall in the thick roof zone, where more intensive elastic energy was released in the coal/rock mass. Also, it is more likely to have a significant dynamic load in the thin roof zone due to the higher possibility of roof breakage, and the total microseismic energy can reach 1.8–3.2E + 08J. HighlightsCase analysis and numerical modelling were used to study the formation mechanism of stress anomaly in coal seams, energy evolution characteristics of the coal/rock mass and its fracture behaviour in the RTVZ.The mechanism of rock bursts induced by coal mining in the RTVZ is determined. The thick roof zone has high-stress concentration, where more intensive elastic energy is released in the coal/rock mass. Due to easier roof breakage, it is more likely to have a significant dynamic load in the thin roof zone.The prevention and control method of rock bursts in the RTVZ is put forward. The rock bursts can be relieved by reducing the initial stress increased in the thick roof zone. Strengthening roadway support can reduce the influence of dynamic load on the roadway. Roof thickness variation rock burst mechanism numerical modeling case analysis Environmental technology. Sanitary engineering Environmental sciences Risk in industry. Risk management HD61 Anye Cao verfasserin aut Wu Cai verfasserin aut Yingyuan Wen verfasserin aut Yaoqi Liu verfasserin aut Songwei Wang verfasserin aut Xuwei Li verfasserin aut In Geomatics, Natural Hazards & Risk Taylor & Francis Group, 2016 13(2022), 1, Seite 1805-1830 (DE-627)626457491 (DE-600)2553648-5 19475713 nnns volume:13 year:2022 number:1 pages:1805-1830 https://doi.org/10.1080/19475705.2022.2100832 kostenfrei https://doaj.org/article/ffb53488243644a9b515e15528c4cb2d kostenfrei https://www.tandfonline.com/doi/10.1080/19475705.2022.2100832 kostenfrei https://doaj.org/toc/1947-5705 Journal toc kostenfrei https://doaj.org/toc/1947-5713 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2022 1 1805-1830
allfieldsSound	10.1080/19475705.2022.2100832 doi (DE-627)DOAJ036755818 (DE-599)DOAJffb53488243644a9b515e15528c4cb2d DE-627 ger DE-627 rakwb eng TD1-1066 GE1-350 Xianxi Bai verfasserin aut Rock burst mechanism induced by stress anomaly in roof thickness variation zone: a case study 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The variation of hard roof thickness is an essential contributor in triggering rock bursts during longwall mining. Case analysis and numerical modeling were used to study the stress and energy characteristics of the coal and rock mass and its fracture behaviour in the roof thickness variation zone (RTVZ). The results show that the coal seam has higher initial stress if overlain by a thicker hard roof, whose stress monitoring value is 1.8–2.6 times that of the thin zone. The increasing variation in the roof thickness or the roof properties causes a greater initial stress change in the coal seam. In the thick roof zones, the superposition of the advanced abutment pressure and the increased initial stress will result in a high-stress concentration area, where the stress mutation coefficient value can be up to 1.08–1.15. A higher rock burst risk might thus present in the roadway near the longwall in the thick roof zone, where more intensive elastic energy was released in the coal/rock mass. Also, it is more likely to have a significant dynamic load in the thin roof zone due to the higher possibility of roof breakage, and the total microseismic energy can reach 1.8–3.2E + 08J. HighlightsCase analysis and numerical modelling were used to study the formation mechanism of stress anomaly in coal seams, energy evolution characteristics of the coal/rock mass and its fracture behaviour in the RTVZ.The mechanism of rock bursts induced by coal mining in the RTVZ is determined. The thick roof zone has high-stress concentration, where more intensive elastic energy is released in the coal/rock mass. Due to easier roof breakage, it is more likely to have a significant dynamic load in the thin roof zone.The prevention and control method of rock bursts in the RTVZ is put forward. The rock bursts can be relieved by reducing the initial stress increased in the thick roof zone. Strengthening roadway support can reduce the influence of dynamic load on the roadway. Roof thickness variation rock burst mechanism numerical modeling case analysis Environmental technology. Sanitary engineering Environmental sciences Risk in industry. Risk management HD61 Anye Cao verfasserin aut Wu Cai verfasserin aut Yingyuan Wen verfasserin aut Yaoqi Liu verfasserin aut Songwei Wang verfasserin aut Xuwei Li verfasserin aut In Geomatics, Natural Hazards & Risk Taylor & Francis Group, 2016 13(2022), 1, Seite 1805-1830 (DE-627)626457491 (DE-600)2553648-5 19475713 nnns volume:13 year:2022 number:1 pages:1805-1830 https://doi.org/10.1080/19475705.2022.2100832 kostenfrei https://doaj.org/article/ffb53488243644a9b515e15528c4cb2d kostenfrei https://www.tandfonline.com/doi/10.1080/19475705.2022.2100832 kostenfrei https://doaj.org/toc/1947-5705 Journal toc kostenfrei https://doaj.org/toc/1947-5713 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2022 1 1805-1830
language	English
source	In Geomatics, Natural Hazards & Risk 13(2022), 1, Seite 1805-1830 volume:13 year:2022 number:1 pages:1805-1830
sourceStr	In Geomatics, Natural Hazards & Risk 13(2022), 1, Seite 1805-1830 volume:13 year:2022 number:1 pages:1805-1830
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Roof thickness variation rock burst mechanism numerical modeling case analysis Environmental technology. Sanitary engineering Environmental sciences Risk in industry. Risk management HD61
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container_title	Geomatics, Natural Hazards & Risk
authorswithroles_txt_mv	Xianxi Bai @@aut@@ Anye Cao @@aut@@ Wu Cai @@aut@@ Yingyuan Wen @@aut@@ Yaoqi Liu @@aut@@ Songwei Wang @@aut@@ Xuwei Li @@aut@@
publishDateDaySort_date	2022-01-01T00:00:00Z
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spellingShingle	Xianxi Bai misc TD1-1066 misc GE1-350 misc Roof thickness variation misc rock burst mechanism misc numerical modeling misc case analysis misc Environmental technology. Sanitary engineering misc Environmental sciences misc Risk in industry. Risk management misc HD61 Rock burst mechanism induced by stress anomaly in roof thickness variation zone: a case study
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topic_title	TD1-1066 GE1-350 Rock burst mechanism induced by stress anomaly in roof thickness variation zone: a case study Roof thickness variation rock burst mechanism numerical modeling case analysis
topic	misc TD1-1066 misc GE1-350 misc Roof thickness variation misc rock burst mechanism misc numerical modeling misc case analysis misc Environmental technology. Sanitary engineering misc Environmental sciences misc Risk in industry. Risk management misc HD61
topic_unstemmed	misc TD1-1066 misc GE1-350 misc Roof thickness variation misc rock burst mechanism misc numerical modeling misc case analysis misc Environmental technology. Sanitary engineering misc Environmental sciences misc Risk in industry. Risk management misc HD61
topic_browse	misc TD1-1066 misc GE1-350 misc Roof thickness variation misc rock burst mechanism misc numerical modeling misc case analysis misc Environmental technology. Sanitary engineering misc Environmental sciences misc Risk in industry. Risk management misc HD61
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title	Rock burst mechanism induced by stress anomaly in roof thickness variation zone: a case study
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title_full	Rock burst mechanism induced by stress anomaly in roof thickness variation zone: a case study
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author_browse	Xianxi Bai Anye Cao Wu Cai Yingyuan Wen Yaoqi Liu Songwei Wang Xuwei Li
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title_sort	rock burst mechanism induced by stress anomaly in roof thickness variation zone: a case study
callnumber	TD1-1066
title_auth	Rock burst mechanism induced by stress anomaly in roof thickness variation zone: a case study
abstract	The variation of hard roof thickness is an essential contributor in triggering rock bursts during longwall mining. Case analysis and numerical modeling were used to study the stress and energy characteristics of the coal and rock mass and its fracture behaviour in the roof thickness variation zone (RTVZ). The results show that the coal seam has higher initial stress if overlain by a thicker hard roof, whose stress monitoring value is 1.8–2.6 times that of the thin zone. The increasing variation in the roof thickness or the roof properties causes a greater initial stress change in the coal seam. In the thick roof zones, the superposition of the advanced abutment pressure and the increased initial stress will result in a high-stress concentration area, where the stress mutation coefficient value can be up to 1.08–1.15. A higher rock burst risk might thus present in the roadway near the longwall in the thick roof zone, where more intensive elastic energy was released in the coal/rock mass. Also, it is more likely to have a significant dynamic load in the thin roof zone due to the higher possibility of roof breakage, and the total microseismic energy can reach 1.8–3.2E + 08J. HighlightsCase analysis and numerical modelling were used to study the formation mechanism of stress anomaly in coal seams, energy evolution characteristics of the coal/rock mass and its fracture behaviour in the RTVZ.The mechanism of rock bursts induced by coal mining in the RTVZ is determined. The thick roof zone has high-stress concentration, where more intensive elastic energy is released in the coal/rock mass. Due to easier roof breakage, it is more likely to have a significant dynamic load in the thin roof zone.The prevention and control method of rock bursts in the RTVZ is put forward. The rock bursts can be relieved by reducing the initial stress increased in the thick roof zone. Strengthening roadway support can reduce the influence of dynamic load on the roadway.
abstractGer	The variation of hard roof thickness is an essential contributor in triggering rock bursts during longwall mining. Case analysis and numerical modeling were used to study the stress and energy characteristics of the coal and rock mass and its fracture behaviour in the roof thickness variation zone (RTVZ). The results show that the coal seam has higher initial stress if overlain by a thicker hard roof, whose stress monitoring value is 1.8–2.6 times that of the thin zone. The increasing variation in the roof thickness or the roof properties causes a greater initial stress change in the coal seam. In the thick roof zones, the superposition of the advanced abutment pressure and the increased initial stress will result in a high-stress concentration area, where the stress mutation coefficient value can be up to 1.08–1.15. A higher rock burst risk might thus present in the roadway near the longwall in the thick roof zone, where more intensive elastic energy was released in the coal/rock mass. Also, it is more likely to have a significant dynamic load in the thin roof zone due to the higher possibility of roof breakage, and the total microseismic energy can reach 1.8–3.2E + 08J. HighlightsCase analysis and numerical modelling were used to study the formation mechanism of stress anomaly in coal seams, energy evolution characteristics of the coal/rock mass and its fracture behaviour in the RTVZ.The mechanism of rock bursts induced by coal mining in the RTVZ is determined. The thick roof zone has high-stress concentration, where more intensive elastic energy is released in the coal/rock mass. Due to easier roof breakage, it is more likely to have a significant dynamic load in the thin roof zone.The prevention and control method of rock bursts in the RTVZ is put forward. The rock bursts can be relieved by reducing the initial stress increased in the thick roof zone. Strengthening roadway support can reduce the influence of dynamic load on the roadway.
abstract_unstemmed	The variation of hard roof thickness is an essential contributor in triggering rock bursts during longwall mining. Case analysis and numerical modeling were used to study the stress and energy characteristics of the coal and rock mass and its fracture behaviour in the roof thickness variation zone (RTVZ). The results show that the coal seam has higher initial stress if overlain by a thicker hard roof, whose stress monitoring value is 1.8–2.6 times that of the thin zone. The increasing variation in the roof thickness or the roof properties causes a greater initial stress change in the coal seam. In the thick roof zones, the superposition of the advanced abutment pressure and the increased initial stress will result in a high-stress concentration area, where the stress mutation coefficient value can be up to 1.08–1.15. A higher rock burst risk might thus present in the roadway near the longwall in the thick roof zone, where more intensive elastic energy was released in the coal/rock mass. Also, it is more likely to have a significant dynamic load in the thin roof zone due to the higher possibility of roof breakage, and the total microseismic energy can reach 1.8–3.2E + 08J. HighlightsCase analysis and numerical modelling were used to study the formation mechanism of stress anomaly in coal seams, energy evolution characteristics of the coal/rock mass and its fracture behaviour in the RTVZ.The mechanism of rock bursts induced by coal mining in the RTVZ is determined. The thick roof zone has high-stress concentration, where more intensive elastic energy is released in the coal/rock mass. Due to easier roof breakage, it is more likely to have a significant dynamic load in the thin roof zone.The prevention and control method of rock bursts in the RTVZ is put forward. The rock bursts can be relieved by reducing the initial stress increased in the thick roof zone. Strengthening roadway support can reduce the influence of dynamic load on the roadway.
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title_short	Rock burst mechanism induced by stress anomaly in roof thickness variation zone: a case study
url	https://doi.org/10.1080/19475705.2022.2100832 https://doaj.org/article/ffb53488243644a9b515e15528c4cb2d https://www.tandfonline.com/doi/10.1080/19475705.2022.2100832 https://doaj.org/toc/1947-5705 https://doaj.org/toc/1947-5713
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