Dynamic collapses of deeply mined coal rocks are severe. In order to explore new ideas for rock burst pre- vention, the relationship between entropy equations and dissipative structure was studied, and a con- cept-roc...Dynamic collapses of deeply mined coal rocks are severe. In order to explore new ideas for rock burst pre- vention, the relationship between entropy equations and dissipative structure was studied, and a con- cept-rock burst activity system （RAS） was proposed and its entropy was analyzed. The energy features of RAS were analyzed, and the relationship between electromagnetic radiation （EMR） intensity E and dis- sipated energy Ud was initially established. We suggest that rock burst normally happens only when d1S - 〈〈 -des in RAS; RAS is the dissipative structure before collapse, and after which it become a new orderly structure, i.e., a ＂dead＂, a statically orderly structure. We advanced that the effective way to prevent rock burst is to introduce entropy to the system for it keeps the system away from the dissipative structure. E and Ud of RAS are positively related, which is used as a bridge between dissipative structure theory and rock burst prevention engineering applications. Based on this, and using the data of rock burst prevention for working face No. 250205up of Yanbei coal mine, an engineering verification for the dissipative struc- ture of RAS was carried out. which showed good results.展开更多
基金supported by the Independent Research Project of State Key Lab of Coal Resources and Mine Safety (CUMT) (No.SKLCRSM09X01)the Youth Science Foundation of the National Natural Science Foundation of China (No. 50904067)the Foundation for the Author of National Excellent Doctoral Dissertation of PR China (No. 201055)
文摘Dynamic collapses of deeply mined coal rocks are severe. In order to explore new ideas for rock burst pre- vention, the relationship between entropy equations and dissipative structure was studied, and a con- cept-rock burst activity system （RAS） was proposed and its entropy was analyzed. The energy features of RAS were analyzed, and the relationship between electromagnetic radiation （EMR） intensity E and dis- sipated energy Ud was initially established. We suggest that rock burst normally happens only when d1S - 〈〈 -des in RAS; RAS is the dissipative structure before collapse, and after which it become a new orderly structure, i.e., a ＂dead＂, a statically orderly structure. We advanced that the effective way to prevent rock burst is to introduce entropy to the system for it keeps the system away from the dissipative structure. E and Ud of RAS are positively related, which is used as a bridge between dissipative structure theory and rock burst prevention engineering applications. Based on this, and using the data of rock burst prevention for working face No. 250205up of Yanbei coal mine, an engineering verification for the dissipative struc- ture of RAS was carried out. which showed good results.
