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DETERMINATION BY NUMERICAL MODELING OF STRESS-STRAIN VARIATIONS RESULTING FROM GALLERY CROSS-SECTION CHANGES IN A LONGWALL TOP COAL CAVING PANEL

Year 2024, Volume: 12 Issue: 1, 231 - 250, 01.03.2024
https://doi.org/10.36306/konjes.1410892

Abstract

As a major pillar of global energy production, coal mining requires continuous advancements in efficiency to contribute to the broader goal of energy sustainability, all the while the shift towards more sustainable energy sources is underway. Mechanized excavation systems employed in underground coal mines, particularly within the longwall mining method, enable high-tonnage coal production. The Longwall Top Coal Caving (LTCC) method, one of the longwall mining techniques, has been developed for the effective extraction of coal from thick coal seams. However, as mining operations delve deeper, various complex issues, such as gallery cross-sectional variation, emerge. Gallery cross-sectional variation can increase the risk of collapse by affecting the stress distribution in the rock mass, posing a threat to worker safety. This study centers on the numerical modeling and analysis of gallery cross-sectional variation in the Ömerler underground mine, operated by the Turkish Coal Enterprises (TKI), West Lignite Enterprise (GLI). To achieve this objective, an extensive database was established through field and laboratory rock mechanics studies. This database was then utilized in the Fast Lagrangian Analysis of Continua 3D (FLAC3D) (v6.0) program to simulate the cross-sectional variations of the A6 panel in the Ömerler underground mine. The numerical simulation results provide valuable insights into the secondary stress-deformation changes associated with gallery cross-sectional variation.

Ethical Statement

The authors declare that the study complies with all applicable laws and regulations and meets ethical standards.

Supporting Institution

TUBITAK (The Scientific and Technological Research Council of Turkey)

Project Number

116M698

Thanks

This work was supported by the TUBITAK (The Scientific and Technological Research Council of Turkey) with a 1001 project (Project No: 116M698).The authors thanks to Turkish Coal Enterprises (TKI) and West Lignite Enterprise (GLI) staff for their help in field studies .

References

  • G. Li, Z. Hu, P. Li, D. Yuan, Z. Feng, W. Wang and Y. Fu, “Innovation for sustainable mining: Integrated planning of underground coal mining and mine reclamation,” Journal of Cleaner Production, 351, 131522, 2022.
  • Z. Hu, G. Li, J. Xia, Z. Feng, J. Han, Z. Chen, W. Wang and G. Li, “Coupling of underground coal mining and mine reclamation for farmland protection and sustainable mining,” Resources Policy, 84, 103756, 2023.
  • International Energy Agency (IEA), World Energy Outlook. (2022). Accessed: July, 19, 2023. [Online]. Available: https://www.iea.org/reports/world-energy-outlook-2022.
  • A. Çelik and Y. Özçelik, “Investigation of the effect of caving height on the efficiency of the longwall top coal caving production method applied in inclined and thick coal seams by physical modeling,” International Journal of Rock Mechanics and Mining Sciences, 162, 105304, 2023.
  • M. Shabanimashcool, and C. C. Li, “Numerical modelling of longwall mining and stability analysis of the gates in a coal mine,”International Journal of Rock Mechanics and Mining Sciences, 51, 24-34, 2012.
  • M. Mesutoğlu, and İ. Özkan, “Büyük Ölçekli Kömür Arınında Gerçekleştirilen Schmidt Sertlik İndeksi ve Nokta Yükleme Dayanımı Deney Sonuçlarının Değerlendirilmesi,” Konya Mühendislik Bilimleri Dergisi, v.7, n.4, pp. 681-695, 2019.
  • L. Zhou, X. Li, Y. Peng, B. Xia, and B. Fang, “Material point method with a strain-softening model to simulate roof strata movement induced by progressive longwall mining,” International Journal of Rock Mechanics and Mining Sciences, 170, 105508, 2023.
  • N.E. Yaşıtlı, and B. Unver, “3D numerical modeling of longwall mining with top-coal caving,” International Journal of Rock Mechanics and Mining Sciences, v.42, i.2, pp. 219-235, 2005.
  • F. Şimşir, and M. K. Özfırat, “Determination of the most effective longwall equipment combination in longwall top coal caving (LTCC) method by simulation modelling,” International Journal of Rock Mechanics and Mining Sciences, v.45, pp. 1015-1023, 2008.
  • T. D. Le, and J. Oh, “Longwall face stability analysis from a discontinuum-Discrete Fracture Network modelling,” Tunnelling and Underground Space Technology, 124, 104480, 2022.
  • H. Wang, J. Wang, D. Elmo, M. He, Z. Ma, and C. Gao, “Ground response mechanism of entries and control methods induced by hard roof in longwall top coal caving panel,” Engineering Failure Analysis, 144, 106940, 2023.
  • A. Çelik and Y. Özçelik, “Investigation of the efficiency of longwall top coal caving method applied by forming a face in horizontal thickness of the seam in steeply inclined thick coal seams by using a physical model,” International Journal of Rock Mechanics and Mining Sciences, 148, 104917, 2021.
  • T. D. Le, J. Oh, B. Hebblewhite, C. Zhang, and R. Mitra, “A discontinuum modelling approach for investigation of Longwall Top Coal Caving mechanisms,” International Journal of Rock Mechanics and Mining Sciences, 106, pp.84-95, 2018.
  • J. Wang, W. Wei, J. Zhang, B. Misra, and A. Li, “Numerical investigation on the caving mechanism with different standard deviations of top coal block size in LTCC,” International Journal of Mining Science and Technology, 30, 583-591, 2020.
  • F. Song, A. Rodriguez-Dono, S. Olivella, Z. Zhong “Analysis and modelling of longitudinal deformation profiles of tunnels excavated in strain-softening time-dependent rock masses,” Computers and Geotechnics, 125, 103643, 2020.
  • F. Song, A. Rodriguez-Dono, “Numerical solutions for tunnels excavated in strain-softening rock masses considering a combined support system,” Applied Mathematical Modelling, 92, 905-930, 2021.
  • R. Çelik, “Developing of Moving Procedure for Powered Supports in Ömerler Coal Mine,” Ph. D. dissertation, Osmangazi Univ. Dep. of Mining Eng., Eskişehir, 2005.
  • M. Mesutoğlu, “Determination of rock bolt and steel set behaviors used in control of longwall tailgate roof strata by numerical analysis,” PhD dissertation, Konya Tech. Univ., Dep. of Mining Eng., Konya, 2019.
  • İ. Özkan, M. Geniş, Ö. Uysal and M. Mesutoğlu “New technology for roof support of coal roadways in our national underground coal mining: Design of roof bolt systems,” TÜBİTAK Project No. 116M698 Final Report, Ankara, 430p. 2022.
  • M. Geniş, and Ö. Aydan, “Static and dynamic stability of a large underground opening,” Proceedings of the second symposium on Underground excavations for Transportation (in Turkish), TMMOB, Istanbul, 2007, pp. 317-326.
  • Ö. Aydan, “A new stress inference method for the stress state of Earth’s crust and its application,”Bulletin of Earthscience, v.22, pp. 223-236, 2000.
  • A. Fişne, “Türkiye Kömür İşletmeleri Kurumu Garp Linyitleri İşletmesi Müdürlüğü Ömerler-A Yeraltı Kömür Ocağı Havalandırma Sisteminin Değerlendirilmesi” Project Report. 2017.
  • D.M. Pappas, and C. Mark, “Behavior of simulated longwall gob material,” Report of Investigation No: 9458, United States Department of the Interior, Bureau of Mines, 1993.
  • M. Salamon, “Mechanism of caving in longwall coal mining, Rock mechanics contributions and challenges” Proceedings of the 31st US symposium, 1990, pp. 161-168.
Year 2024, Volume: 12 Issue: 1, 231 - 250, 01.03.2024
https://doi.org/10.36306/konjes.1410892

Abstract

Project Number

116M698

References

  • G. Li, Z. Hu, P. Li, D. Yuan, Z. Feng, W. Wang and Y. Fu, “Innovation for sustainable mining: Integrated planning of underground coal mining and mine reclamation,” Journal of Cleaner Production, 351, 131522, 2022.
  • Z. Hu, G. Li, J. Xia, Z. Feng, J. Han, Z. Chen, W. Wang and G. Li, “Coupling of underground coal mining and mine reclamation for farmland protection and sustainable mining,” Resources Policy, 84, 103756, 2023.
  • International Energy Agency (IEA), World Energy Outlook. (2022). Accessed: July, 19, 2023. [Online]. Available: https://www.iea.org/reports/world-energy-outlook-2022.
  • A. Çelik and Y. Özçelik, “Investigation of the effect of caving height on the efficiency of the longwall top coal caving production method applied in inclined and thick coal seams by physical modeling,” International Journal of Rock Mechanics and Mining Sciences, 162, 105304, 2023.
  • M. Shabanimashcool, and C. C. Li, “Numerical modelling of longwall mining and stability analysis of the gates in a coal mine,”International Journal of Rock Mechanics and Mining Sciences, 51, 24-34, 2012.
  • M. Mesutoğlu, and İ. Özkan, “Büyük Ölçekli Kömür Arınında Gerçekleştirilen Schmidt Sertlik İndeksi ve Nokta Yükleme Dayanımı Deney Sonuçlarının Değerlendirilmesi,” Konya Mühendislik Bilimleri Dergisi, v.7, n.4, pp. 681-695, 2019.
  • L. Zhou, X. Li, Y. Peng, B. Xia, and B. Fang, “Material point method with a strain-softening model to simulate roof strata movement induced by progressive longwall mining,” International Journal of Rock Mechanics and Mining Sciences, 170, 105508, 2023.
  • N.E. Yaşıtlı, and B. Unver, “3D numerical modeling of longwall mining with top-coal caving,” International Journal of Rock Mechanics and Mining Sciences, v.42, i.2, pp. 219-235, 2005.
  • F. Şimşir, and M. K. Özfırat, “Determination of the most effective longwall equipment combination in longwall top coal caving (LTCC) method by simulation modelling,” International Journal of Rock Mechanics and Mining Sciences, v.45, pp. 1015-1023, 2008.
  • T. D. Le, and J. Oh, “Longwall face stability analysis from a discontinuum-Discrete Fracture Network modelling,” Tunnelling and Underground Space Technology, 124, 104480, 2022.
  • H. Wang, J. Wang, D. Elmo, M. He, Z. Ma, and C. Gao, “Ground response mechanism of entries and control methods induced by hard roof in longwall top coal caving panel,” Engineering Failure Analysis, 144, 106940, 2023.
  • A. Çelik and Y. Özçelik, “Investigation of the efficiency of longwall top coal caving method applied by forming a face in horizontal thickness of the seam in steeply inclined thick coal seams by using a physical model,” International Journal of Rock Mechanics and Mining Sciences, 148, 104917, 2021.
  • T. D. Le, J. Oh, B. Hebblewhite, C. Zhang, and R. Mitra, “A discontinuum modelling approach for investigation of Longwall Top Coal Caving mechanisms,” International Journal of Rock Mechanics and Mining Sciences, 106, pp.84-95, 2018.
  • J. Wang, W. Wei, J. Zhang, B. Misra, and A. Li, “Numerical investigation on the caving mechanism with different standard deviations of top coal block size in LTCC,” International Journal of Mining Science and Technology, 30, 583-591, 2020.
  • F. Song, A. Rodriguez-Dono, S. Olivella, Z. Zhong “Analysis and modelling of longitudinal deformation profiles of tunnels excavated in strain-softening time-dependent rock masses,” Computers and Geotechnics, 125, 103643, 2020.
  • F. Song, A. Rodriguez-Dono, “Numerical solutions for tunnels excavated in strain-softening rock masses considering a combined support system,” Applied Mathematical Modelling, 92, 905-930, 2021.
  • R. Çelik, “Developing of Moving Procedure for Powered Supports in Ömerler Coal Mine,” Ph. D. dissertation, Osmangazi Univ. Dep. of Mining Eng., Eskişehir, 2005.
  • M. Mesutoğlu, “Determination of rock bolt and steel set behaviors used in control of longwall tailgate roof strata by numerical analysis,” PhD dissertation, Konya Tech. Univ., Dep. of Mining Eng., Konya, 2019.
  • İ. Özkan, M. Geniş, Ö. Uysal and M. Mesutoğlu “New technology for roof support of coal roadways in our national underground coal mining: Design of roof bolt systems,” TÜBİTAK Project No. 116M698 Final Report, Ankara, 430p. 2022.
  • M. Geniş, and Ö. Aydan, “Static and dynamic stability of a large underground opening,” Proceedings of the second symposium on Underground excavations for Transportation (in Turkish), TMMOB, Istanbul, 2007, pp. 317-326.
  • Ö. Aydan, “A new stress inference method for the stress state of Earth’s crust and its application,”Bulletin of Earthscience, v.22, pp. 223-236, 2000.
  • A. Fişne, “Türkiye Kömür İşletmeleri Kurumu Garp Linyitleri İşletmesi Müdürlüğü Ömerler-A Yeraltı Kömür Ocağı Havalandırma Sisteminin Değerlendirilmesi” Project Report. 2017.
  • D.M. Pappas, and C. Mark, “Behavior of simulated longwall gob material,” Report of Investigation No: 9458, United States Department of the Interior, Bureau of Mines, 1993.
  • M. Salamon, “Mechanism of caving in longwall coal mining, Rock mechanics contributions and challenges” Proceedings of the 31st US symposium, 1990, pp. 161-168.
There are 24 citations in total.

Details

Primary Language English
Subjects Rock Mechanics and Fortification, Coal
Journal Section Research Article
Authors

Mehmet Mesutoğlu 0000-0002-5243-3962

İhsan Özkan 0000-0002-8268-3188

Alfonso Rodrıguez Dono This is me 0000-0002-2296-4826

Project Number 116M698
Publication Date March 1, 2024
Submission Date December 27, 2023
Acceptance Date February 7, 2024
Published in Issue Year 2024 Volume: 12 Issue: 1

Cite

IEEE M. Mesutoğlu, İ. Özkan, and A. Rodrıguez Dono, “DETERMINATION BY NUMERICAL MODELING OF STRESS-STRAIN VARIATIONS RESULTING FROM GALLERY CROSS-SECTION CHANGES IN A LONGWALL TOP COAL CAVING PANEL”, KONJES, vol. 12, no. 1, pp. 231–250, 2024, doi: 10.36306/konjes.1410892.