煤矿安全2023，Vol.54Issue(12)：134-142,9.DOI:10.13347/j.cnki.mkaq.2023.12.016
刀把式工作面切眼对接阶段煤体采动应力分布规律研究
Research on mining stress distribution law of coal body during open-off cut butt-joining stage of knife handle working face
摘要
Abstract
Taking the 23304 knife handle working face of Yungaishan No.2 Coal Mine as the engineering background,the pressure distribution and ground pressure law of the coal around the joint face during the transition from short working face to long working face are studied when the fracture types of the main roof of the working face directly affects the knife handle working face.Theoret-ical analysis combined with 3DEC numerical simulation was used to analyze the different fracture types and overlying rock structur-al characteristics of the main roof at the docking stage between No.1 open-off cut and No.2 open-off cut of Yungaishan No.2 Coal Mine,revealing the influence law of different rock beam properties on the range of internal stress field.The results show that the de-gree of influence of lateral key block B fracture on the coal body is from small to large:the side of the mining area,in front of the coal wall,and directly above the coal wall,the location of the lateral basic top fracture is 6.21 m deep into the coal body,and the in-ternal stress field range is about 12.91-14.43 m.The elastic modulus of the coal body shows a negative correlation and the most sig-nificant influence on the internal stress field range.关键词
刀把式工作面/基本顶断裂/覆岩结构/侧向支承应力/内外应力场Key words
knife handle working face/main roof fracture/overlying rock structure/lateral abutment pressure/internal and external stress field分类
矿业与冶金引用本文复制引用
张盛,惠钰博,赵龙刚,刘建康,邵林林,王帅宾..刀把式工作面切眼对接阶段煤体采动应力分布规律研究[J].煤矿安全,2023,54(12):134-142,9.基金项目
国家自然科学基金青年科学基金资助项目(52004081) （52004081）
河南省高校基本科研业务费专项资金资助项目(NSFRF210306) （NSFRF210306）
