AUTOMATED SYSTEM FOR CONTROL AND PREVENTION OF EXPLOSION OF DUST-METHANE-AIR MIXTURE IN COMPLEX MECHANISED MINING FACE Russian patent published in 2012 - IPC E21F5/00 

FIELD: mining.

SUBSTANCE: automated system for control and prevention of explosion of dust-methane-air mixture in complex mechanised mining face consists of irrigation pipeline, high-pressure pump, low-pressure and high-pressure pipelines of automated system with electrical valves and solenoid valves, nozzles for waterspray, measuring instruments for methane, carbonic oxide, humidity, dust level of mine atmosphere and ash-content in dust, air flow rate in the beginning and in the end of mechanised mining face, measuring instruments for methane content and position sensor installed directly on cutter-loader, measuring instruments for water pressure in pipelines connected via data transmission modules to communication lines and controller, control unit with lines for control of electrical valves and solenoid valves. The system differs in the fact that during constant control of measuring instruments readings, position of cutter-loader in mining face, electrical valves and solenoid valves, which are recorded to "black box", divergence of input and output parameters from specified values and proximity of content of methane, dust and its ash-content, carbonic oxide in mine atmosphere to lower level of explosion of dust-methane-air mixture is analysed continuously, control actions are developed with prefacing for dispersed supply of fine water calculated volume from high-pressure pump through high-pressure pipeline, electrical valves and fine-spray nozzles to space of complex mechanised mining face in order to provide condensation point in mine atmosphere considering actual temperature. At that fine water is supplied opposite to air flow in mining face before and/or after cutter-loader considering direction of its movement and system transportation lag.

EFFECT: improving control and preventing explosion of dust-methane-air mixture in complex mechanised mining face.

1 dwg