煤矿安全2024，Vol.55Issue(8)：108-115,8.DOI:10.13347/j.cnki.mkaq.20230759
硬厚顶板破断结构演化及冲击危险区分析
Evolution of broken structure of hard thick roof and analysis of impact hazard area
摘要
Abstract
Aiming at the influence of hard and thick roof fracture and structural evolution on the impact of working face,taking the hard and thick roof condition of 63 upper 05 working face in Dongtan Coal Mine as the engineering background,the critical condi-tion and structural evolution process of hard and thick roof fracture and instability are studied by theoretical analysis and numerical simulation,and the dangerous area of working face impact is divided.It is concluded that the thickness and strength of the roof are proportional to the vertical load at the end of the block breaking.The structure of immediate roof and main roof gradually evolved from"V"type to"U"type.The first and periodic steps of the double hard thick roof increase obviously compared with the conven-tional condition,and the evolution of the basic roof structure is more retarded than that of the direct roof.The vertical stress of the roof evolves in the form of stress arch,and many stress concentration phenomena are formed in the mined-out area during mining.Based on the above research results,the impact danger area of 63 upper 05 working face was divided and the accuracy was verified by microseismic monitoring technology.关键词
冲击地压/硬厚顶板/顶板结构/覆岩破断/危险区划分Key words
rock burst/hard and thick roof/roof structure/overlying rock fracture/hazardous area classification分类
矿业与冶金引用本文复制引用
吕鹏飞,崔学凯,苗壮,路康斌,耿伊健..硬厚顶板破断结构演化及冲击危险区分析[J].煤矿安全,2024,55(8):108-115,8.基金项目
国家自然科学基金地区科学基金资助项目(52064043) （52064043）
内蒙古自治区自然科学基金面上资助项目(2023MS05028) （2023MS05028）
内蒙古自治区直属高校基本科研业务费资助项目(2023QNJS092) （2023QNJS092）
