Changes of Coal Molecular and Pore Structure under Ultrasonic Stimulation

In view of the limitation of the conventional coal seam fracturing method, an ultrasonic stimulation method was proposed. Utilizing the combined effects of ultrasonic cavitation, mechanical vibration, and thermal conditions, the coal will form a network of intertwined cracks, and the gas will desorb and flow more easily. Current research on the changes of coal molecular and pore structure under ultrasonic stimulation is not in-depth. In this...