METHOD FOR DETERMINATION OF OUTBURST HAZARD OF BITUMINOUS COALS AND DEVICE FOR ITS REALIZATION

摘要

FIELD: mining. SUBSTANCE: coal samples are taken and subjected to polarization in course of their cooling from 200 to minus 196 C. Then, samples are heated from minus 196 to 200 C, and during heating electric charges of samples are measured. Values of charges serve to determine the category of outburst hazard of coals. Device has measuring cell with electrodes located in furnace. Measuring cell is connected with source of polarizing voltage. Novelty covers charge amplifier, comparator and indicator. Measuring cell through switch is connected with inputs of polarizing voltage source and charge amplifier. Outputs of charge amplifier and sources of threshold voltage are connected with input of comparator whose output is connected with indicator. EFFECT: higher efficiency. 2 cl, 2 dwg, 1 tbl