FIELD: mining.;SUBSTANCE: invention can be used in development of high-strength high-clay sands of precious metals gravel deposits in underwater faces. Process of strong high-clay sands destruction is performed in automatic mode by means of control system with mechanical ripper, installed in the direction of movement of the screen with slots, mechanical ripper is made in the form of conical roller cutter with elements of erosion destruction-washing, and conical roller cutter rotates at speed and presses the face with force depending on strength, hardness, abrasibility and fracturing of strong high clay sands. System is equipped with stationary hydrodynamic reflectors-cavitators with stiffness ribs to create resonant acoustic phenomena in hydrous flow before suction and intensification of mix solid component disintegration.;EFFECT: higher efficiency of strong high clay sands by means of conical roller cutter with elements of erosion destruction-washing and disintegration of the hydraulic mix mineral component by using resonance acoustic phenomena in hydrous flow by means of reflectors.;1 cl, 1 dwg
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