PROCEDURE OF STUDYING THE MOVEMENT OF IMPACT DEVICE CASE IN A BOREHOLE TAKING INTO ACCOUNT THE ROCK MASS REACTION
L. V. Gorodilov, V. P. Efimov, P. V. Sazhin, V. G. Kudryavtsev, A. I. Pershin
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Impact device, rock mass, case, striker, friction force, oscillogram, acceleration
Abstract
A procedure of experimental study of the impact device case movement in a borehole has been developed, including the use of “low-frequency” current-vortex) displacement sensors and “high-frequency” (accelerometers) acceleration sensors. After registration, software signal processing was performed, including double integration of accelerations and determination of points of interface of displacements obtained after integration and direct registration. Oscillograms of measurements at different values of reaction from the rock mass are given. The quantitative aspects of the phenomenon are discussed, and an attempt is made to identify the relationship between the quantitative indicators of impact pulses and case displacement.
|
