BENCH TO ANALYSE ROCK DRILLING MODES Russian patent published in 2014 - IPC E21B3/00 E21C39/00 

FIELD: mining.

SUBSTANCE: bench comprises bearing plate, drill bar length with drill tool running in bearings, feed hydraulic cylinder, strain gage links, spinner and rock specimen. Additionally, bench comprises percussion mechanism exciting axial force pulses and percussion mechanism exciting torque pulses secured at supports arranged on stationary bearing plate. Said both mechanisms are secured to transmit their appropriate pulses to bar with drill tool via strain gages. Note here that said spinner with rock specimen is arranged in feeder displacing in frame guides.

EFFECT: higher precision of measurements.

3 dwg