Research on Outburst Proneness Evolution of Compound Coal-rock Structure Body with Numerical Experiment
Outburst proneness as a index for coal rock burst dangerous evaluation,it is sometimes under estimate the stability of coal and rock.The numerical experiments of different height ratio and different roof strength,homogeneity,interface angle to the structure bursting liability was researched based on coal-rock compound structure samples with RFPA2D software.It is shown that the outburst proneness of coal-rock compound structure is higher than single coal or single rock and is more closer to actual.With the strength,the height,the heterogeneity index of rock increasing,outburst proneness of coal-rock compound structure becomes stmnger.The outburst proneness increasing and the combined body whole strength decreasing for the interface angle increasing,the post-peak plastic deformation is more obvious.When the interface angle is in a certain,the accumulative AE energy decrease for the roof strength increasing.In addition,stronger the outburst proneness,the accumulative AE energy of coal-rock compound structure weaker during the phase of plastic deformation.
coal-rock compound structure outburst proneness rock burst monitoring and predication
Zhao Shankun Han Rongjun Wei Xiangzhi Zhang Ningbo Xu Zijie
Mine Safety Technology Branch, China Coal Research Institute, Beijing, 100013,China;State Key Labora Yima Coal Group Co., Ltd., Sanmenxia, 472300, China
国际会议
International Symposium on Rock Mechanics and Mine Dynamic Disaster Prevention(岩石力学与矿井动力灾害防治国际学术研讨会)
辽宁阜新
英文
58-63
2013-07-13(万方平台首次上网日期,不代表论文的发表时间)