Distribution law of horizontal pore water pressure around diversion conduit

It is of great significance for calculating the recovery rate of the rare earth resources in-situ leaching to master the distribution law of pore water pressure around the diversion conduit.Assuming that the channel of water flowing into the diversion conduit horizontally is the ubiquitous 2-branched fractal tree-like network structure，based on Hagen-Poiseuille equation，the horizontal pore water pressure distribution expression of the diversion conduit was put forward.The indoor model test results showed that they were effective to describe the seepage channel of the water flowing into the diversion conduit by using the 2-branched fractal tree-like network structure；with increasing of the initial water head，the length ratio of the pipe at each level of the tree-like branched network gradually increased and the increasing range was smaller and smaller，but the diameter ratio and the length of the primary pipe gradually decreased，then became stable，diameter ratio of the pipe at all levels was stable at 0.84.