METHOD AND DEVICE FOR FORMING EXTENSIVE DEVELOPMENT OF DIRECTED CRACKS IN ROCK MASS

摘要

FIELD: mining art; oil-gas industry. SUBSTANCE: fluid is pumped under pressure into well which has voltage concentrator cavity being pressurized. Fluid is pumped at pulse mode till hydraulic break. Pulse frequency is improved if resistance of material to be broken increases. Device has tubular case inside which the extensible chamber is disposed. The chamber communicates with elastic plates placed inside cavity of concentrator and mounted for forming slit between them in order to remove fluid out of the cavity which is formed between case and plates. This cavity is connected with cavity of extensible chamber by means of valve made in form of split funnel mounted for displacement onto unclamp cone. EFFECT: improved efficiency of operation. 2 cl, 2 dwg