The mechanism of the process of disintegration of frozen sandy-argillaceous rocks in an aqueous medium is associated with abnormal dependences of the coefficient of linear expansion of frozen dispersed rocks from the temperature and it is resulted with the following phenomenon: one can observe capillary formations in a sample, the surface of it contacting with water and water penetration in high velocity and the formation of a filtrated potential. This process is accompanied by micro and hydro impulses, cavitation, disintegrating capillary walls and the outburst of disintegrated material and appearance of natural electric field of a great value.