Studied the water flowing characteristics in gangue used as water-gravel-mixed filling material from one Uranic mine. For samples with different gravel granularity, seepage test was done under constant water head pressure and found that the flux of water will descend to a steady value with the time changing, and the relations among seepage rate, permeability and stopped-up water flux can be described in mathematics function. Secondly, that seepage rate of filling material is mainly determined by the smallest granule not big ones contained in it. Thirdly, that seepage rate is sensitive to poros...
