With the intensification of deep coal exploitation in China, rock burst hazards induced by high in-situ stress and complex overburden structures severely constrain safe and efficient mining. As a typical enrichment area of deep thick coal seams, the Ordos mining area exhibits significant differences in working face dynamic manifestations and roadway surrounding rock response characteristics under fully mechanized top coal caving (FMTCC) and fully mechanized mining (FMM) technologies. However, the correlation effects between different mining technologies and dynamic manifestations, alongside their depth adaptability, require further investigation. Taking the 2215 FMM and 2102 FMTCC working faces in Yingpanhao Coal Mine as case studies, a theoretical model of abutment pressure was established, and calculation methods for peak abutment pressure under different mining methods were derived. Based on PFC numerical simulations, elastic strain energy accumulation and release characteristics across strata under different technologies and depths were identified, revealing the formation mechanism of dynamic manifestation differences between FMTCC and FMM. The results indicate that FMTCC technology can buffer the elastic energy suddenly released by the bending and fracturing of near-field strata through the energy dissipation mechanism of top-coal damage and crushing. This mechanism restricts the transfer of near-field elastic energy to the front of the coal wall, thereby reducing the peak advanced abutment stress of the FMTCC working face from the source. At depths of 300—800 m, this peak pressure generally decreases to 87.9%—93.8% of FMM faces; during compression and crushing, the top coal effectively absorbs and dissipates the energy released by near-field strata fractures, weakening the near-field stress concentration. Compared with FMM, near-field thick hard strata energy release is significantly lower under FMTCC, consistent with microseismic observations showing "low energy and low frequency" features during initial weighting, single-square, and double-square stages. When the burial depth exceeds 600 m, FMTCC shows a significantly superior effect in near-field energy regulation and rock burst prevention in deep mining compared to FMM. This study provides a reference for the selection of safe mining technologies and dynamic disaster prevention and control.
PANYishan, QIQingxin, DOULinming, et al. Rock burst engineering[M]. Beijing: Higher Education Press, 2022.
[3]
XIEH P, JUY, RENS H, et al. Theoretical and technological exploration of deep in situ fluidized coal mining[J]. Frontiers in Energy, 2019, 13(4): 603-611.
[4]
RANJITHP G, ZHAOJ, JUM H, et al. Opportunities and challenges in deep mining: A brief review[J]. Engineering, 2017, 3(4): 250-261.
LIUWenchao, ZHAOYixin, GUOJihong. Mechanisms and control of rock bursts in goaf-side roadways under the condition of thick and hard roofs in the Xinjie mining area, Inner Mongolia[J]. Coal Geology & Exploration, 2024, 52(10): 153-165.
[7]
钱鸣高,许家林,王家臣,等. 矿山压力与岩层控制[M]. 徐州:中国矿业大学出版社,2021.
[8]
QIANMinggao, XUJialin, WANGJiachen, et al. Ground pressure and strata control[M]. Xuzhou: China University of Mining and Technology Press, 2021.
DOULinming, LIZhenlei, HEXueqiu. Principle of rockburst control by weakening static and dynamic loading using top-coal caving in the mining of thick coal seams[J]. Journal of China University of Mining & Technology, 2018, 47(2): 221-230.
XUJialin, JUJinfeng. Structural morphology of key stratum and its influence on strata behaviors in fully-mechanized face with super-large mining height[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(8): 1547-1556.
[13]
JUJ F, XUJ L. Structural characteristics of key strata and strata behaviour of a fully mechanized longwall face with 7.0 m height chocks[J]. International Journal of Rock Mechanics and Mining Sciences, 2013, 58:46-54.
YUBin, YANGJingxuan, GAORui. Mechanism and technology of roof collaborative controlling in the process of Jurassic and Carboniferous coal mining in Datong mining area[J]. Journal of China University of Mining & Technology, 2018, 47(3): 486-493.
[16]
YUB, GAOR, KUANGT J, et al. Engineering study on fracturing high-level hard rock strata by ground hydraulic action[J]. Tunnelling and Underground Space Technology, 2019, 86: 156-164.
YUBin, GAORui, MENGXiangbin, et al. Near-far strata structure instability and associate strata behaviors in large space and corresponding control technology[J]. Chinese Journal of Rock Mechanics and Engineering, 2018, 37(5): 1134-1145.
LIHuamin, JIANGDongjie, LIDongyin. Analysis of ground pressure and roof movement in fully-mechanized top coal caving with large mining height in ultra-thick seam[J]. Journal of China Coal Society, 2014, 39(10): 1956-1960.
[21]
LUY B, YANS H, ZHOUK Y, et al. Structural quantification of multi-thick hard roof and strong ground pressure control in large mining height stope: A case study[J]. Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2025, 11(1): 56.
LUYangbo, YANShaohong, ZHOUKunyou, et al. Migration fracture quantitative and control of thick-hard roof in fullwidth working face with large mining height[J]. Journal of China University of Mining & Technology, 2025, 54(4): 754-769.
YULei, YANShaohong. Study on roof movement form and mine strata pressure law of fully-mechanized top coal caving mining in ultra thick seam[J]. Coal Science and Technology, 2015, 43(8): 40-44.
ZHAIXinxian, ZHAOXiaofan, ZHAIYanwei, et al. Separation and fracturing mechanical models of overlying hugely-thick conglomerate stratum in fully mechanized caving mining and their application[J]. Journal of China University of Mining & Technology, 2023, 52(2): 241-254.
XIEGuangxiang. Mechanical characteristics of fully mechanized top-coal caving face and surrounding rock stress shell[J]. Journal of China Coal Society, 2005, 30(3): 309-313.
[30]
XIEG X, CHANGJ C, YANGK. Investigations into stress shell characteristics of surrounding rock in fully mechanized top-coal caving face[J]. International Journal of Rock Mechanics and Mining Sciences, 2009, 46(1): 172-181.
[31]
LIQ H, WANGH N, ZHENGX J, et al. Adaptability analysis of full height mining at one time of deep soft thick coal seam[J]. Frontiers in Earth Science, 2022, 10: 862710.
[32]
王 博. 陕蒙深部矿区典型动力灾害发生机理及防治研究[D]. 北京:北京科技大学,2021.
[33]
WANGBo. Mechanism and control of typical dynamic disasters in deep mining areas of Shaanxi and Inner Mongolia[D]. Beijing: University of Science and Technology Beijing, 2021.
[34]
ZHANGH, ZHANGJ, XUZ H, et al. Overburden breakage and surface damage evolution under high-intensity mining of shallow coal seams: evidence from Shendong mining area[J]. Scientific Reports, 2025, 15(1): 23152.
[35]
CHENX J, LIL Y, WANGL, et al. The current situation and prevention and control countermeasures for typical dynamic disasters in kilometer-deep mines in China[J]. Safety Science, 2019, 115: 229-236.
QIQingxin, PANYishan, SHULongyong, et al. Theory and technical framework of prevention and control with different sources in multi-scales for coal and rock dynamic disasters in deep mining of coal mines[J]. Journal of China Coal Society, 2018, 43(7): 1801-1810.
WANGJiachen, LIUYunxi, ZHANGWei, et al. Cooperative control of face wall stability and top-coal cavability of LTCC panel in hard seam with large cutting height and hard roof[J]. Journal of Mining and Strata Control Engineering, 2025, 7(5): 5-18.
YUANLiang, TUQingyi, ZHAOZuheng, et al. Research on the crushing specific work of particle coal and its energy transfer law during compression crushing process[J]. Journal of Mining Science and Technology, 2025, 10(5): 785-796.
[42]
WANGJ C, WANGZ H. Systematic principles of surrounding rock control in longwall mining within thick coal seams[J]. International Journal of Mining Science and Technology, 2019, 29(1): 65-71.
[43]
WANGZ L, WANGH W, QUQ D, et al. Determination of mining-induced stress based on mining face hydraulic support stress and micro-seismicity[J]. Journal of Rock Mechanics and Geotechnical Engineering, 2025, 17(9): 5493-5508.
[44]
TANX Y, CHENW Z, WANGL L, et al. Spatial deduction of mining-induced stress redistribution using an optimized non-negative matrix factorization model[J]. Journal of Rock Mechanics and Geotechnical Engineering, 2023, 15(11): 2868-2876.
XUYongxiang, WANGGuofa, LIMingzhong, et al. Numerical simulation of longwall top-coal caving with extra-thick and hard coal seam based on bonded particle model[J]. Journal of China Coal Society, 2019, 44(11): 3317-3328.
ZUOJianping, XUChengyi, ZHANShuaifei, et al. True triaxial failure behavior and structure-material synergistic failure mechanism of coal-rock composites[J]. Journal of China University of Mining & Technology, 2025, 54(2): 287-303.
ZHAOGuoyan, DAIBing, MAChi. Study of effects of microparameters on macroproperties for parallel bonded model[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(7): 1491-1498.
XIAOFukun, XIEKai, GUYuan, et al. Mesoscopic parameter calibration method for collapsed body considering phase states: Using parallel bonding model as an illustration[J]. Rock and Soil Mechanics, 2024, 45(Sup 1): 13-24.
[53]
CAOA Y, DOUL M, WANGC B, et al. Microseismic precursory characteristics of rock burst hazard in mining areas near a large residual coal pillar: A case study from Xuzhuang coal mine, Xuzhou, China[J]. Rock Mechanics and Rock Engineering, 2016, 49(11): 4407-4422.