METHOD TO EXTRACT SULFUR FROM DEEP BOREHOLES Russian patent published in 1995 - IPC

FIELD: mining industry. SUBSTANCE: method provides for usage of definite order of boreholes drilling in ore stratum. Nonexplosivepneumatic seismic vibration sources are positioned in boreholes, that are edging ore stratum, at stratum location depth. Field of acting in stratum tensions and main vectors of maximum and minimum main tensions are determined. Vibration sources are oriented in direction of maximum main tension action. Powerful vibration oscillations are excited on 60 1500 Hz frequencies in conjunction with softening solutions pumping in and during change of compression deformations for strain deformations they use frequency of stratum natural oscillations and hot water of 80 C temperature is pumped in. Then on the way of elastic wave spreading cavitation explosions are initiated and then they begin to pump useful component out of borehole. EFFECT: method is effective in boreholes, depth of which reaches to 15 km. 11 cl, 1 dwg