METHOD FOR ACOUSTIC PREDICTION OF SUDDEN OUTBURSTS OF COAL, ROCK AND GAS IN UNDERGROUND WORKINGS

摘要

Method for acoustic prediction of sudden outbursts of coal, rock and gas in underground workings includes generation of acoustic vibrations with working mechanisms, registration of man-caused and natural acoustic vibrations passed through rock massive, measurement of characteristics of those, evaluation of stressed state. Besides that one simultaneously determines velocity, phase, amplitude parameters of man-caused and natural acoustic vibrations with following integrated analysis of those, with comparison to critical values, and determination of probability of manifestation of gas-dynamical effect (P) is determined from relationship:.