超声波在煤矿井下环境中的传播与衰减特性  

Propagation and attenuation characteristics of ultrasonic in underground environment of coal mine

作　　者：蔡峰[1] 袁媛[1] 刘泽功[1] 曹珍贯[1] CAI Feng;YUAN Yuan;LIU Zegong;CAO Zhenguan(State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology,Huainan,Anhui 232001,China)

机构地区：[1]安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室,安徽淮南232001

出　　处：《中国矿业大学学报》2021年第4期685-690,共6页Journal of China University of Mining & Technology

基　　金：国家重点研发计划项目(2018YFC0808100)。

摘　　要：超声波的传播具有穿透性强、传播稳定、非接触的特点,使得超声波在测距和测流量领域获得研究和应用.为将超声波检测技术引入矿井风速测定领域,必须对超声波在矿井大气中的传播特性进行有针对性的研究.本文利用理论分析、数值模拟和实验研究相结合的方法,系统的分析了超声波在煤尘-空气混合物中的传播和衰减特性.研究获得了超声波长与煤尘颗粒的关系表达式,揭示了煤尘的体积分数、煤尘粒径与超声波波长的比值以及煤尘粒径对超声波声速和衰减系数的影响关系.研究成果为研发新型煤矿井下超声波风速传感器提供了必要的理论基础.The propagation of ultrasonic has the characteristics of strong penetration,stable propagation and non-contact,which makes the ultrasonic obtain research and application in the field of distance measurement and flow measurement.In order to introduce ultrasonic testing technology into the field of mine wind speed measurement,it is necessary to study the propagation characteristics of ultrasonic in the mine atmosphere.In this paper,the propagation and attenuation characteristics of ultrasonic waves in mixture of coal-dust and air were systematically analyzed by theoretical analysis,numerical simulation and experimental research.The relationship between ultrasonic wave length and coal dust particles was obtained.The influence of the coal dust volume fraction,the ratio of the particle size to ultrasonic wave length and the coal dust particle size on the ultrasonic sound speed and attenuation coefficient were revealed.The results provide a necessary theoretical basis for the research and development of new type of ultrasonic wind speed sensor in coal mine.

关 键 词：超声波 煤尘 传播 衰减特性 

分 类 号：TD723[矿业工程—矿井通风与安全]