Research on coal-rock interface recognition based on ultrasonic phased array
LI Li
OUYANG Chunping
Abstract：Coal-rock interface is one of the most difficulty in the mechanized coal mining.The method of coal-rock interface recognition based on ultrasonic phased array was proposed using the difference of acoustic impedance between coal and rock and the phased array technology.Analysed the results of ultrasonic tests on acoustic velocity and attenuation coefficient of coal and rock,the model of coal-rock with ultrasonic phased array was built based on the theory of heterogeneous scattering field.The numerical simulations of the different kind coal-rock models detected by different frequencies with ultrasonic phased array were carried out.The ultrasonic echo signals and images of coal-rock were got and the interfaces of coal-rock were recognized.The results show that the coal-rock modeling with ultrasonic phased array and its numerical simulation in the method are correct,and method of ultrasonic phased array can be used in research of coal-rock interface recognition.
Keywords：coal-rock interface recognitionultrasonic detectionphased arrayattenuation coefficientcenter frequency
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 485-492 )