FACILITY MONITORING DUST AND EXPLOSION-PROOFNESS OF MINE WORKINGS Russian patent published in 2004 - IPC

FIELD: mining industry, safety engineering while conducting mining operations, short-time analysis of hazard of explosion of coal dust deposits in mining workings and quality of rock dusting. SUBSTANCE: facility has pump for atomization of dust sample, blasting chamber with blasting cap and systems supplying voltage to blasting cap and blast recording, flame-arresting chamber and pneumatic accumulator connected to pump. Blasting chamber is fitted with grid for placement of dust sample and is connected through above-mentioned grid to pneumatic accumulator and through flame- arresting chamber to suction space of pump. System recording blasts has photoresistors installed in blasting chamber and flame indicator connected to them. Suction space of pump is integrated with its piston space and is connected through valves to pneumatic accumulator and flame-arresting chamber. Pneumatic accumulator is connected to blasting chamber through valve interlocked by system supplying voltage to blasting cap. EFFECT: increased accuracy of monitoring with due account of all factors existing at place where test is conducted. 2 cl, 1 dwg