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Integrative solution of stress evolution in overburden roof strata during the coal seam mining by application of complex variable functions methodology
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Yinkai Lia, Hongwei Wanga, c, *, Zhanbin Zhub, Daixin Denga, d, Naisheng Jiange
Rock Mechanics Bulletin | 2026, 5(2) : 100236
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Rock Mechanics Bulletin | 2026, 5(2): 100236
• Full Length Article •
Integrative solution of stress evolution in overburden roof strata during the coal seam mining by application of complex variable functions methodology
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Yinkai Lia, Hongwei Wanga, c, *, Zhanbin Zhub, Daixin Denga, d, Naisheng Jiange
Affiliations
  • aSchool of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing, 100083, China
  • bMataihao Coal Mine, Inner Mongolia Ordos Yongmei Mining Industry Co., Ltd., Ordos, 017212, China
  • cJoint National-Local Engineering Research Centre for Safe and Precise Coal Mining (Anhui University of Science and Technology), Huainan, 232001, China
  • dSchool of Mechanical Engineering, Sichuan University of Science and Engineering, Zigong, 643000, China
  • eSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
Published: 2026-04-10 doi: 10.1016/j.rockmb.2025.100236
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Large-scale roof collapse is a major dynamic hazard threatening the safe coal mine operations. Understanding the deformation and failure characteristics of overburden rock strata, as well as deciphering the stress evolution mechanism of overburden rock structure in mining stopes, is of great theoretical advancement and engineering applications in roof disasters prevention. This study employs a theoretical derivation to systematically analyze the characteristics of overburden roof deformation and caving behavior during the coal seam mining. By modeling the trapezoidal caving zone in the overburden roof strata as a complex functional system, the stress distribution within the caving zone and adjacent intact strata was mathematically characterized. Stress evolution patterns of overburden strata at different caving stages were derived under both elastic and elastoplastic deformation conditions, accompanied by the demarcation of elastic-plastic zones. In addition, the critical length for the first caving and periodic caving of overburden are theoretically determined. To validate the proposed analytical framework, comprehensive numerical simulation and physical model tests are conducted to investigate the overburden roof caving characteristics during coal seam mining. Quantitative comparisons between experimental, numerical results and theoretical analyses were performed in terms of the caving range of roof strata, the critical length for the roof strata caving and stress distribution. The consistencies among different approaches confirms the reliability of the theoretical model, providing a robust foundation for optimizing mining designs and implementing effective roof control strategies.

Overburden roof caving  /  Complex variable functions  /  Mechanical model  /  Stress evolution  /  Numerical simulation
Yinkai Li, Hongwei Wang, Zhanbin Zhu, Daixin Deng, Naisheng Jiang. Integrative solution of stress evolution in overburden roof strata during the coal seam mining by application of complex variable functions methodology[J]. Rock Mechanics Bulletin, 2026 , 5 (2) : 100236 - . DOI: 10.1016/j.rockmb.2025.100236
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  • State Key Research Development Program of China(2024YFC3013804)
  • Independent Research fund of Joint National-Local Engineering Research Center for Safe and Precise Coal Mining (Anhui University of Science and Technology)(EC2022001)
  • National Natural Science Foundation of China(41872205)
  • Beijing Natural Science Foundation(8202041)
  • State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology, Beijing(XDJJ2020001-006)
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Year 2026 volume 5 Issue 2
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Article Info
doi: 10.1016/j.rockmb.2025.100236
  • Receive Date：2025-04-11
  • Online Date：2026-06-17
  • Published：2026-04-10
Article Data
Affiliations
History
  • Received：2025-04-11
  • Revised：2025-06-07
  • Accepted：2025-08-09
Funding
State Key Research Development Program of China(2024YFC3013804)
Independent Research fund of Joint National-Local Engineering Research Center for Safe and Precise Coal Mining (Anhui University of Science and Technology)(EC2022001)
National Natural Science Foundation of China(41872205)
Beijing Natural Science Foundation(8202041)
State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology, Beijing(XDJJ2020001-006)
Affiliations
    aSchool of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing, 100083, China
    bMataihao Coal Mine, Inner Mongolia Ordos Yongmei Mining Industry Co., Ltd., Ordos, 017212, China
    cJoint National-Local Engineering Research Centre for Safe and Precise Coal Mining (Anhui University of Science and Technology), Huainan, 232001, China
    dSchool of Mechanical Engineering, Sichuan University of Science and Engineering, Zigong, 643000, China
    eSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

Corresponding:

* Corresponding author. E-mail address: (H. Wang).
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表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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