CHENG Chun- qi;ZHANG Dan (Huainan Institute of Technology;Huainan 2 32 0 0 1;

• 1:China) ZHENG Gao- sheng (National Investigating Xinji Coal and Energy LTD.
• 2:Huainan 2 32 0 2 4
• 3:China)

Abstract：

A correct quantitative estimation of the influence of suspensoid colmatage upon the seeping progress of suspensions in the m edia is helpful for the reasonable designation of injection technolgy and for controlling the injecting process. The mathematical model describing the colmatage and its influence on seeping behavior of suspensions consists of the three differential equations presented in this paper:transportation equation of suspensoids,kinetic sedim entation equation of suspensoids and flow equation of suspension.The theoretical solution of one- dim ensional model for suspensions flowing in porous media resulted by finite difference method respectively at constant flow discharge and constant boundary pressure difference demonstrated thatdue to colmatage the flowing state of suspensions is always unsteady,and with the change of seeping time the hydraulic gradient increases gradually at constant discharge conditions or the discharge rate decreases gradually at constant boundary pressure difference conditions in the flow field.

Key Words： colmatage;porous m edium;seepage of suspensio

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Author: CHENG Chun- qi;ZHANG Dan (Huainan Institute of Technology;Huainan 2 32 0 0 1;

References：

• [1]　薛禹群.地下水动力学原理[M].北京:地质出版社,1986:17—20.
• [2]　TrzaskaA.The effect of colmatage on the magnitude of thedischarge of flow during bore-hole exploration of water[J].ArchiwwmGornictwa,1988,33(1):34—38