METHOD OF FORECASTING EXPLOSION HAZARD OF MINED-OUT AREA OF A MINING FACE Russian patent published in 2019 - IPC E21F7/00 E21F5/12 

FIELD: mining.

SUBSTANCE: invention relates to method of forecasting explosion hazard of mined-out area of mining face. Method of forecasting explosion hazard of mined-out space of mining face includes measurement of air flow rate, concentration of gases of hybrid mixture and their ignition temperature. Points for determination of gas-dynamic parameters with an interval of location are selected along the length of the lava. Spacing interval is multiple of minute speed of coal mincer deflection. Airflow flowing through the lava in the passages between the support sections is measured. Differences of air flows on incoming and outgoing jets are used to determine air leaks from lava into mined space. Potential explosion hazard of the mined space is determined by volume of air leaking from the lava and hazard index of the hybrid mixture. Danger index of the hybrid mixture is the product of the content of the most dangerous component in the gas sample on the binding energy of that component.

EFFECT: forecast of potential explosive hazard of mined-out area of mining face.

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