METHOD OF SEISMIC WAVE SOFTENING OF UNWORKED COALS AND WELL SEISMIC VIBRATOR Russian patent published in 2012 - IPC E21B28/00 E21F5/00 G01V1/02 

FIELD: mining.

SUBSTANCE: invention relates to mining, in particular, to coal industry, and may be used to prepare coal beds for mining in order to intensify processes of coal cutting and discharge during excavation of steep coal beds by methods of sublevel caving. The invention objective is solved by the method of seismic wave softening of unworked coals, including drilling of a well along a bed, installation of a seismic vibrator in it with pressing to well walls and subsequent treatment of unworked coal, which is carried out by polarised seismic wave vibration impact from a seismic vibrator fixed as thrusting the well with the possibility to retain the value of thrusting force as not lower than the maximum amplitude of forcing effect of the seismic vibrator in direction across stratification, and bed softening is carried out by transverse waves of shift deformations, and with longitudinal waves of compression-stretching - into side rocks. The well seismic vibrator comprises a cylindrical vessel made as composite of two shells movably coupled with each other with the possibility of reciprocal movement in cross direction along guides, at the same time on one shell there is a vibration exciter fixed, an unbalance shaft of which is installed on bearings in a closed vessel mounted on the shell with the help of a hinged joint and an elastic damping suspension, with the possibility to make return-rotary oscillations in the plane of its cross section, and the mechanism to press the vessel to the well wall is made in the form of two spacer hydraulic cylinders of double-sided action, which with cartridges and single-sided stems are hingedly connected to shells in planes of installation of paired guides with symmetrical arrangement between them.

EFFECT: higher efficiency of softening of steep and sloping coal beds prepared for excavation.

3 cl, 5 dwg