METHOD FOR SOFTENING AND DISINTEGRATION OF SHALLOW DEPOSIT CLAY SANDS Russian patent published in 2010 - IPC B03B5/00 E21C41/30 

FIELD: mining.

SUBSTANCE: invention relates to mining and may be used for development of natural and technogenic high-clayey gravel deposits of minerals with an increased content of fine-grained and disperse-grained gold. The method for softening and disintegration of shallow deposit clay sands involves deposit opening, digging a water supply trench slanted towards the deposit stratum drop and a water collection trench of a depth with a difference of bottom marks in the trenches from 1.5 to 3 m, filling the water supply trench with water with simultaneous water-filling of the deposit area under development to a depth sufficient for mounting and installation of equipment in a floating state and subsequent maintenance of the level for primary softening of clay sands by way of supply of water through an adjustable shutter, mounting the delivery hydrotransportation installation, process of natural filtration of water into the bulk. One mounts an ultrasonic installation and a mechanical installation. Successively one intensifies filtration of water into the compacted sand strata by way of ultrasonic impact on the sands along the surface of the site being developed by means of radiation in the interval of low ultrasonic frequencies ensuring maximum amplitude of displacement of compacted sand particles and radiation intensity parameters creating stress-strain tension, resistance to rupture and shear exceeding the normative data for deposit frozen sands strength. One performs intensification of disintegration of water-saturated sand surfaces with ultrasound at the same radiation frequency but reduced parametres of ultrasonic radiation intensity corresponding to the averaged equilibrium density and compressibility of water saturated sands. Then one performs hydrodynamic activation by way of mixing the hydromixture with an element of the mechanical installation and supply of the hydromixture with the help of the delivery hydrotransportation installation to the concentrating installation.

EFFECT: improved efficiency of destruction and disintegration of deposit clay sands.

2 dwg, 2 tbl