AEROGAS CONTROL (AGC) OVER COAL MINE ATMOSPHERE Russian patent published in 2014 - IPC E21F5/00 E21F17/18 

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method consists in continuous monitoring of mine atmosphere composition and parameters and application of data for diagnostics of its state and for detection of unauthorised interference with AGC standard operating conditions. Note here that to up the AGC data content, quantity of methane control points is increased to magnitude n depending on face length and defined as optimum number of control points sufficient for tracking the variable pattern of methane concentration distribution over controlled object vent flow. Note here that the following jobs are executed to this end. First, background magnitudes of signals on methane concentration in controlled points during preparation shift at invariable vent flow and idle mine mechanisms and machines. Then during working shifts in online mode, current magnitudes of said signals are registered and compared with appropriate background magnitudes to reveal unauthorised interference if current magnitudes of signals are lower than background magnitudes.

EFFECT: higher efficiency of AGC control.

5 cl, 1 dwg