CONTROL AND DETERMINATION METHOD OF COORDINATES OF DANGEROUS STATE OF MINE ROCK MASSIF AT UNDERGROUND MINING OPERATIONS

摘要

FIELD: mining.SUBSTANCE: bore pits are drilled; acoustic emission sensors are installed in them; signals from acoustic emission sensors are recorded and processed; forecast of dangerous state of mine rock massif is evaluated as per processing results. Signal processing is performed using an analysis of arrival signs of acoustic emission pulses. Distribution of arrival signs on a stereographic projection is built for each acoustic emission source. Availability of a dangerous state of mine rock massif is evaluated, ratio of acting stresses is determined and values of angles of fall and spread for dangerous planes and directions are determined at detection of regular grouping of arrival signs of acoustic emission pulses. Coordinates of possible rock bump or mine rock massif fall are calculated as per the analysis of distribution in mine rock massive volume of arrival signs of acoustic emission pulses.EFFECT: improving accurate and reliable determination of coordinates of possible rock bump or fall of mine rock massif.3 dwg