岩石冲击倾向与其波速变化的相关性研究

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Abstract A quantificational formula between ultrasonic velocity through rock specimens and rock burst tendency with increasing strain is deduced，and it is proved reliable based on the test results of three different kinds of rock specimens under uniaxial compression. The results show that：(1) When rock burst tendency is strong，the ultrasonic velocity almost keeps constant as the strain increases in forepart of loading，and declines suddenly at the point of 90% peak strength；when rock burst tendency is weak，ultrasonic velocity declines gradually during the whole deformation process. (2) A new conception called attenuation factor of ultrasonic velocity is put forward to represent the rock burst tendency，and the classification criterion is suggested. (3) The wave velocity test is conducted in three different kinds of rocks on burst tendency under uniaxial compression，and the test data fit the quantificational formula well.

Key words： rock mechanics burst tendency ultrasonic velocity attenuation factor of ultrasonic velocity prediction

Received: 11 April 2012

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https://rockmech.whrsm.ac.cn/EN/Y2012/V31/Is2/3527

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