Laboratory measurements of the acoustic velocities and elastic property of coal rocks and their link with micro-features

摘要

The goal of this experimental study is to establish the correlations between acoustic velocities, elastic property and microstructures as well as mineral composition. Microstructures and mineral composition were examined by slice identification combined with scanning electron microscope (SEM), and acoustic velocity and elastic property were tested through ultrasonic testing. By testing rock physics properties of 10 coal rock samples, we are able to characterize the influence of micro pore-fracture system of coal on rock physics properties.