COMPLEX METHOD OF HYDRO EXCAVATION OF MINERALS Russian patent published in 2008 - IPC E21C41/16 E21C45/00 

FIELD: mining.

SUBSTANCE: complex method of hydro excavation of minerals consists of development mining, of equipping with ventilation system and system of heating of mine working, of hydraulic breaking up of bed with an automated mining combine in a continuous mode of operation with installation of face supports, of hydraulic transporting of broken rock, of concentration of obtained mass and its further dehydration, of drying of water encroached beds, and of purifying of process liquid with its recirculation. Hydraulic breaking up of a bed is carried out simultaneously with its impulse mechanical destruction by means of introducing an abrasive material of upgraded hardness into a liquid jet; further abrasive material is separated from broken rock at the time of its hydraulic transporting and concentrating; concentration of broken rock and partial separation of liquid pulp with abrasive material from broken rock are performed by means of transporting and mixing them at the roller type facility; flowing down pulp with abrasive material is driven to purification by means of a pumping system wherein solid particles of abrasive material are separated from the rest of the pulp and where abrasive material is saturated with solid particles of broken rock of specified dimension. Saturated abrasive material is directed to recirculation, while partially purified process liquid is mixed with the liquid obtained at drying of water saturated beds; then process liquid is finally purified by cold evaporation and is brought to recirculation. A portion of purified process liquid is supplied to the ventilation system of mine working and is dispersed in air in form of fine dispersed particles; continuous control measurements of air temperature, of explosion hazardous particles and coal dust contents in air are carried out during mine working operations.

EFFECT: upgraded versatility, efficiency, automaton, quality and reliability of process behavior in constraint conditions of mine working, improvement of ecological situation at mine.

4 dwg