雷国荣, 李春元, 齐庆新, 王嘉敏, 杜伟升, 李向上… - 煤炭科学技术, 2024 - mtkxjs.com.cn
… velocity and mechanical properties of coal-rock mass, multilayer and multi-directional ultrasonic
… the content of coal and rock, the calculation model of longitudinal wave velocity of coal-…