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Top Coal Deformation and Support during Mining Process of Fully Mechanized Caving Face
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Hao-fu DONG1, Chao LI2, *, Wei ZHANG1, Ling-xiao YIN3, Yang LIU1, Feng-chao WANG4, Yue NIU2
Science Technology and Engineering | 2025, 25(17) : 7107 - 7114
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Science Technology and Engineering | 2025, 25(17): 7107-7114
• Papers-Mining and Metallurgical Engineering •
Top Coal Deformation and Support during Mining Process of Fully Mechanized Caving Face
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Hao-fu DONG1, Chao LI2, *, Wei ZHANG1, Ling-xiao YIN3, Yang LIU1, Feng-chao WANG4, Yue NIU2
Affiliations
  • 1 Huating Coal Industry Group Co., Ltd., Dongxia Coal Mine, Pingliang 744100, China
  • 2 School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China
  • 3 School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
  • 4 School of Low Carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China
Published: 2025-06-18 doi: 10.12404/j.issn.1671-1815.2406346
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In order to study the deformation problem of the top coal area during the mining process of the fully mechanized top coal caving face, taking the fully mechanized top coal caving face of the Dongxia coal mine project as the engineering background, based on the specific coal seam characteristics of the fully mechanized top coal caving face, the support type and the parameters of support strength of the fully mechanized top coal caving face were analyzed. At the same time, combined with on-site monitoring data, the rated working resistance of the hydraulic support meets the on-site requirements of the working face. The discrete element software simulation analysis method was used to numerically simulate the deformation and support of the top coal during the mining process of the fully mechanized caving face in Dongxia coal mine project, and its application effect was verified. As the working face continues to move forward, the overlying basic roof undergoes periodic collapse, with an average cycle of about 20 m in step distance. In addition, the support effect of hydraulic support on the fully mechanized top coal caving working face did not change significantly with the increase of the advancing length. According to on-site monitoring data and calculation results, it is known that the selected hydraulic support can meet the support requirements of the fully mechanized mining face in the project.

fully mechanized caving face  /  coal seam characteristics  /  support parameters  /  numerical simulation  /  top coal deformation
Hao-fu DONG, Chao LI, Wei ZHANG, Ling-xiao YIN, Yang LIU, Feng-chao WANG, Yue NIU. Top Coal Deformation and Support during Mining Process of Fully Mechanized Caving Face[J]. Science Technology and Engineering, 2025 , 25 (17) : 7107 -7114 . DOI: 10.12404/j.issn.1671-1815.2406346
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Year 2025 volume 25 Issue 17
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doi: 10.12404/j.issn.1671-1815.2406346
  • Receive Date：2024-08-23
  • Online Date：2025-12-15
  • Published：2025-06-18
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History
  • Received：2024-08-23
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Affiliations
    1 Huating Coal Industry Group Co., Ltd., Dongxia Coal Mine, Pingliang 744100, China
    2 School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China
    3 School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
    4 School of Low Carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
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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