Pore water's velocity, grain's velocity and pore pressure have discontinues at the first stage of choking. Discontinues will disappear with the disappearing of choking state.
孔隙水流速、颗粒速度和孔压在堵塞初期有间断，间断会随着堵塞的消失而消失。
2
Based on the forming principle of choking phenomenon, an approach is proposed to measure the sonic velocity of air-powder two-phase flow.