Estimation of average ejection velocity generated by rib burst under compression load. (April 2020)

• Record Type: Journal Article
• Authors: Yang, Xiaohan; Ren, Ting; Tan, Lihai
• Is Part Of: International journal of rock mechanics and mining sciences. Volume 128(2020)
• Publication Date: 2020-04
• Subjects: Coal burst -- Fragmentation -- Ejection velocity -- Underground mining; Rock mechanics -- Periodicals; Soil mechanics -- Periodicals; Mining engineering -- Periodicals; Roches, Mécanique des -- Périodiques; Sols, Mécanique des -- Périodiques; Technique minière -- Périodiques; 624.151305
• DOI: 10.1016/j.ijrmms.2020.104277
• Languages: English
• ISSNs: 1365-1609

Abstract

Abstract: The ejection velocity associated with coal burst is an important parameter for support and protection structure design against coal ejection, as the support or protection design rationale is to dissipate or absorb the kinetic energy carried by ejected coal. This paper provides a novel method to estimate the average particle ejection velocity of rib burst based on the energy dissipation and coal fragmentation of coal brittle failure. This research shows that the scale of kinetic energy released by coal burst in underground roadways can reach over 10 7 J, which can offer ejected coal with an over 26 m/s initial velocity and cause serious even fatal injury to miners without sufficient protection.