METHOD FOR AUTOMATED CURRENT PROGNOSIS OF UNEXPECTED EXHAUSTS OF COAL AND GAS Russian patent published in 2005 - IPC

Abstract RU 2250376 C2

FIELD: mining industry.

SUBSTANCE: relation of amplitudes K of high-frequency and low-frequency portions of acoustic oscillations spectrum, generated by cutting tool into coal massif, in process of extraction. Current values of coefficient K_m are compared to limit allowed value K_m.lim. In that case limit acceptable value K_m.lim is continuously automatically corrected in accordance to current value of methane concentration in mine atmosphere, recorded by methane control equipment, and is periodically corrected in accordance to measured hardness of coal by means of special hardness meter. Zone of coal bed is referred to as exhaust-hazardous, if K_m≥K_m.lim and as not exhaust-hazardous, if K_m<K_m.lim.

EFFECT: higher precision.

3 cl, 4 dwg, 1 ex

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RU 2 250 376 C2

Authors

Shadrin A.V.

Dates

2005-04-20—Published

2003-06-16—Filed