OCCURRING MECHANISM AND NUMERICAL SIMULATION OF TENSION TYPE OF ROCK BURSTS OF HARD ROOF
The paper analyzes the occurring mechanism of tension rock burst of hard roof and points out that a large area of goaf is formed and a large tensile stress region after a large area of thick hard roof is mined. When the micro-cracks of the internal rock accumulate to a certain extent, it may cause the avalanche type of chain reaction, under the micro-disturbance. The roof rock cracking and formation of the process of separation layer are simulated with finite element software. The result shows that the stress is released and redistributed and a new stress concentration is formed after the roof cracking. Occurring mechanism and numerical simulation of tension rock burst of hard roof can provide theoretical basis for predicting the rock burst of roof bearing tension type.
NA ZHAO LAI-GUI WANG
College of Mechanics and Engineering, Liaoning Technical University Fuxin 123000, China
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
691-694
2009-08-21(万方平台首次上网日期,不代表论文的发表时间)