岩体声发射传播衰减理论分析与试验研究  

Theory analysis and experimental study of the spread and attenuation of acoustic emission in rock body

作　　者：邹银辉[1] 文光才[2] 胡千庭[3] 许进鹏[1] 

机构地区：[1]山东科技大学资源与环境工程学院,山东泰安271019 [2]重庆大学西南资源开发及环境灾害控制工程教育部重点实验室,重庆400044 [3]煤炭科学研究总院重庆分院,重庆400037

出　　处：《煤炭学报》2004年第6期663-667,共5页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(50134040);高等学校重点实验室访问学者基金资助项目

摘　　要：介绍了岩体介质中的应力波,根据弹性力学相关理论推导了岩体声发射传播的波动方程,分析了影响声发射波在岩体介质中传播时的衰减因素,实验验证了相关理论.现场试验表明,井下声发射具有突发性、随机性、波形变异性,煤体中声发射频率较低,有效接收范围为20～30m.Introduced stress wave in the medium of rock body. Wave formula of rock body acoustic emission(AE) can be deduced according some elasticity mechanics theory. The factor of attenuation was studied in theory while AE wave spreads in rock body, and validated it by experiments. Applications indicate, AE has character of occurring abruptly, randomicity and variability of wave shape. AE of coal body shows low frequency and may receive effectively in the scope of 20～30 m.

关 键 词：岩体 声发射 衰减 波动方程 波形特征 频谱分析 

分 类 号：TU459.3[建筑科学—岩土工程]