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　What regulations should be implemented when equipment failure occurs during operation and needs to be overhauled?？

　Failure in the operation of the equipment must be stopped to deal with maintenance equipment or enter the machine to clean up debris, must strictly implement the "blackout license plate" system, and set up a special person to monitor.‍

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　Which parts of mechanical equipment should be equipped with guards？

　In hazardous areas such as rotating belts, open gears, coupling belts close to the ground, drive shafts, pulleys, flywheels, grinding wheels and electrical circuits of machinery and equipment.。

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　What to do when the coal feeder is jammed and blocked by materials in operation？‍

　To be handled with special tools, not to reach out, such as must work directly with the hands should be stopped, power outages。

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　What are the conditions in which an electric motor must be shut down?？

　Motor running sound is not normal; motor temperature is too high or smoke, there is a burning smell; motor bearings overheating; motor operation in two consecutive power outages; motor junction box fire; motor vibration in operation。‍

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　What conditions should be notified to dispatch and stopped during belt transportation?

　Severe belt deflection, the risk of scraping and tearing the belt; belt clamps are badly worn, the side clamps have been pulled apart by more than 20 millimeters; the motor and reducer may be damaged or the transmission parts are broken, etc.。‍

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　What regulations should be observed in the operation of water pumps？

　Do not run without water; do not run with the gate valve closed; the suction pipe flooding depth in operation shall not be less than 0.5m; run in the direction of the pump labeling。‍

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　Prevention of coal dust explosions？

　Take measures to reduce the amount of coal dust generated; dust reduction measures; ventilation and dust removal; strengthen the bright management and improve the knowledge of fire prevention; prevent the generation of blasting ignition sources; prevent electrical ignition sources and electrostatic ignition sources; prevent friction and impact sparks。‍

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　What regulations must be observed in places where coal dust is more concentrated, such as coal bunkers and raw coal preparation and drying workshops？

　Regularly clean the ground and equipment to prevent the accumulation of coal bins; electrical equipment must be explosion-proof or take explosion-proof measures; no open-flame operation (special circumstances must be handled in accordance with the relevant procedures) and smoking; the content of coal dust in the air must not exceed10mg/m3。‍

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　What regulations must be observed in places where coal dust is more concentrated, such as coal bunkers and raw coal preparation and drying workshops？

　Regularly clean the ground and equipment to prevent the accumulation of coal bins; electrical equipment must be explosion-proof or take explosion-proof measures; no open-flame operation (special circumstances must be handled in accordance with the relevant procedures) and smoking; the content of coal dust in the air must not exceed10mg/m3。