METHOD OF BOREHOLE MINING OF MINERAL SALTS Russian patent published in 2002 - IPC

FIELD: mining of mineral salts; applicable in mining industry including combined mining of salts and hydrocarbon materials. SUBSTANCE: method includes drilling-in of producing bed by vertical-horizontal hole whose horizontal part runs near foot of producing bed; supply of working solution and delivery of mineral salt brine to surface; drying of horizontal part of hole, loading it with explosives and blasting of producing bed; mounting of mining unit and washing out of producing bed broken rock during advancing of mining up to end of hole horizontal part with delivery of formed pulp to surface and formation of horizontal cleaning room. The working solution is supplied for dissolving of rocks disturbed by blast and supply of brine to surface by moving of mining unit operating in regime of dissolving to beginning of hole horizontal part. In case of large thickness of producing bed, additional horizontal hole is drilled above and parallel to formed cleaning room with shrinkage of rocks by blast into underlying existing horizontal cleaning room. Drilled additionally from one vertical hole are several opposite horizontal holes which are worked alternately or simultaneously. Invention may find application in construction engineering, in construction with the help of holes of underground storage of liquid and gaseous products in beds of mineral salts of medium and low thickness, and in burying of solid and liquid wastes of production enterprises. EFFECT: intensified and simplified method of bore mining and high economic efficiency due to reduction of expenditures for drilling of additional holes and formation of cleaning rooms. 3 cl, 4 dwg