Elastic Energy Distribution Regular In The Process of Hard Roof Fracture and Its Influence Factors
Rockburst is one of the severe natural calamities in coal mine. Its energy variation regular is always studied emphatically. Based on the study of material mechanics and rock mechanics theory in coal mining,, the mechanical model of hard roof initial fracture basing on uniform stress and increment stress was put up, the calculation formula of energy distribution of elastic basic beam was put forward, which studied on the stored and released energy distribution regular of hard roof fracture ahead the coal face. As the hard roof hangs to limit distance, it will fracture at the maximum bending moment position ahead the coalface, the elastic rebound and compression phenomenon will occur, and the more elastic energy will be released. The closer of distance to coal face, the more stored energy of elastic basic beam, the more released energy is too after roof beam fracturing. The elastic ground rigidity, roof beam height and hanging length have more obviously influence on elastic energy.
rockburst hard roof fracture energy influence factor
Li Xinyuan Ma Nianjie Gao Quenchen Zhu Yongjian
School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beij School of Resource and Safety Engineering, China University of Mining and Technology (Beijing), Beij School of Resource and Safety Engineering, China University of Mining and Technology (Beijing), Beij
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
742-748
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）