Mechanism of rock burst vertical damage induced by layered crack structures of the steeply inclined extremely thick coal seams
Taoping Zhong1
Zhenlei Li1
Dazhao Song2
Majid Khan1
Xueqiu He3
Zemin Chen1
Chao Zhou1
Xudong Liu4
Panfei Feng4
1.Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine,School of Resources and Safety Engineering,University of Science and Technology Beijing,Beijing 100083,China2.Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine,School of Resources and Safety Engineering,University of Science and Technology Beijing,Beijing 100083,China;Xinjiang Key Laboratory of Coal Mine Disaster Intelligent Prevention and Emergency Response,Xinjiang Institute of Engineering,Ürümqi 830023,China;CHN Energy Xinjiang Energy Co.,LTD,Ürümqi 830027,China3.Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine,School of Resources and Safety Engineering,University of Science and Technology Beijing,Beijing 100083,China;Xinjiang Key Laboratory of Coal Mine Disaster Intelligent Prevention and Emergency Response,Xinjiang Institute of Engineering,Ürümqi 830023,China4.CHN Energy Xinjiang Energy Co.,LTD,Ürümqi 830027,China
摘要：This study focuses on steeply inclined and extremely thick coal seams(SIETCS)characterized by immense thickness,a steep inclination of coal seams(87°),and high horizontal stress.The geological conditions and mining technology associ-ated with SIETCS differ significantly from those of generally inclined coal seams,resulting in notable variations in roadway stress distributions.On SIETCS have predominantly examined the impact of rock layers flanking coal seams on rock bursts,with limited emphasis on SIETCS roadways.This study employs comprehensive methods,integrating numerical simula-tions,theoretical analyses,and field detections to investigate the stress distribution of SIETCS and the mechanisms of rock burst-induced vertical damage,subsequently validated in situ.The vertical stress in SIETCS is minimal,while horizontal stress is concentrated,leading to the formation of layered crack structures(LCS)that distribute above and below the road-ways.Additionally,elastic energy significantly concentrates within the LCS.Axial dynamic compressive stress and vertical dynamic tensile stress along the LCS diminish its stability,readily triggering failure.During the LCS failure process,the stored energy is released,converting into kinetic energy required for coal body ejection after reaching the minimum energy for failure and dissipative energy,ultimately leading to rock burst-induced vertical damage in roadways.On-site detection and analysis within SIETCS,along with historical rock burst data,confirm the existence of LCS and its role in inducing vertical rock burst damage.This research establishes essential foundations for preventing rock bursts within SIETCS.
机标关键词：mechanismverticalburstdamagerockcoalcrackextremely
论文发表日期：2025-04-30
在线出版日期：2025-10-15（本平台首次上网日期，不代表文献的发表时间）
页数：22( 123-144 )
英文信息