(长沙矿山研究院， 长沙 410012)
摘 要: 应用分形几何方法，对室内岩石试样及矿山顶板冒落前后的声发射参数进行分析，寻求顶板冒落过程中声发射参数的分形特性，用分维来研究岩体失稳的声发射规律。研究结果发现：采场顶板岩体冒落前的声发射参数(C、E )分布符合分形，不同类型的岩体虽然失稳前分维 D 大小不同，但表现出相同的规律性，即顶板处于相对稳定期时，分维值上升，当声发射参数达到临界状态时，分维值开始下降，分形维随岩体破坏的发展而减小，特别是最低的分维产生于岩体破坏灾害附近。
关键字: 分维 声发射 采场顶板 失稳
（Changsha Institute of Mining Resarch, Changsha, 410012）
Abstract:Acoustic emission(AE) parameters, measeured from rock speciments in laboratory and monitored from stopes before/after roof collapses , were studied by using fractal geometric method, so as to investigate their fractal characteristics during the rock failure process. Meanwhile the AE rules governing rock mass destabilization were investigated through fractal dimension study. The research results indieated that the fractal dimension values of the stope roof rock-mass before suddenly collapsing exibit certatin regularity which can be used to evaluate the stability of the rock in stoping and excavation more scientifically, and to predict the activation of rock pressure in mining and excavation processes.
Key words: fractal dimension AE roof destabilization
