METHOD FOR COMPRESSION TESTING OF ROCK STRENGTH PROPERTIES AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2018 - IPC E21C39/00 G01N3/303 

FIELD: testing equipment.

SUBSTANCE: placing a sample on anvil, exposing the sample to the falling weight of known initial energy, receipting impulses of acoustic signals arising at destruction of the sample. The sample is pre-compressed by static force in the direction of the falling weight. The initial energy of the falling weight is increased from zero to occurrence of microcracks in the sample, and it is recorded by frequency spectrum of pulses of acoustic signals. The sample is compressed by static force over the entire range of its resistance to destruction. The device has a bed frame, a guide in the form of a tube for turning, a striking member with a mechanism for driving it in motion located in the tube cavity. The bed frame is in the form of a sleeve with ports for installation of the sample and a radial hole, in which the tube with inner thread is fixed, to which a screw with a handle is screwed. The sleeve is connected by threaded connection to the tube, in the end of which a plug is inserted from the side of the threaded connection with the possibility of limited longitudinal movement. A piston is placed in the sleeve between the ports and radial hole. Elastic material is fed between the piston and the sleeve bottom and into the tube. Elastic material pressure sensor and a system for determining a set of physical quantities characterizing rock breaking process, for example, the spectrum of elastic vibrations from arising microcracks are provided.

EFFECT: possibility for acting on rock by a set of static and dynamic loads before the occurrence of microcracks and registration of their occurrence by the spectrum of elastic oscillations, increased efficiency of the device due to expanded capabilities of rock static compression, reception and processing of elastic oscillations.

2 cl, 2 dwg