1.Replacement tape conveyor rack hazard source identification

1)Hazard source: no empty belt before stopping.
Description of risks and consequences: It is easy to start or cause a broken belt accident.
Pre-control measures:Mine maintenance fitter must check to ensure that the coal on the belt is turned to empty before stopping. The mine maintenance fitter can find heavy-duty shutdown when the tear belt, buckle damage is serious or the deviation is severe.

2)Hazard source: Unblocked when the machine is stopped, not listed.
Description of risk and its consequences: It is prone to personal injury caused by incorrect start of the belt.
Pre-control measures: After the mine maintenance fitter stops, the stop button and the local emergency stop button must be locked. And the warning sign that “some people work is not allowed to close” is hoisted.

3)Hazard source: It has not been adjusted after replacement.
Description of risk and its consequences: Easy to occur tape deviation.
Pre-control measures: After the replacement is completed, the string pin must be completed and the tape machine adjusted straight.

4)The source of danger: not cleaned the site to find tools.
Description of risks and consequences: Easy to cause damage to the belt.
Pre-control measures: Mine maintenance fitters must clean up the tools on site before starting the machine, confirming that all tools are fully collected and free of debris.

5)Hazard source: Persons around the equipment have not been inspected.
Description of risks and consequences: Easy to be pulled by a rotating belt.
Pre-control measures: Before the mine maintenance fitter starts, check the personnel around the belt to confirm that there is no personnel before starting.

2.Replacing the belt conveyor motor bearing hazard source identification

1)Hazard source: no empty belt before stopping.
Description of risk and its consequences: easy to start or break accident
Pre-control measures: Before the driver of the belt conveyor, the driver must check to ensure that the coal on the belt is empty before it can be stopped; the driver of the belt conveyor can find that the tear belt, the buckle is seriously damaged or the deviation is severe, and the overload can be overloaded. Stop.

2)Hazard source: Unblocked when the machine is stopped, not listed.
Description of risk and its consequences: It is easy to cause the belt to be accidentally started and cause injury.
Pre-control measures: The stop button and the emergency stop button must be locked after the belt conveyor driver stops. And the warning sign “Someone works, no closing” is suspended.

3)Hazard source: The gas concentration is not checked.
Description of risks and consequences: Easy to cause gas accidents.
Pre-control measures: Before repairing the belt conveyor electromechanical bearing, the mine maintenance fitter must check the construction site and ensure that the gas concentration does not exceed 0.5%. If the gas concentration exceeds the limit, contact the ventilation team in time, and the gas concentration is normal before working.

4)Hazard source: When the protective cover is removed, the personnel are not properly matched.
Description of risk and its consequences: It is easy to cause the protective cover to fall and hurt people.
Pre-control measures: The mine maintenance fitter selects the appropriate tool according to the size of the bolt; The mine maintenance fitter is commanded by a special person when taking the shield, and the two people cooperate closely to remove the shield.

5)Hazard source: The personnel stand under the lifting motor.
Description of risks and consequences: It is prone to motor damage and injury.
Pre-control measures: The mine maintenance fitter must check the personnel under the motor, and the lifting personnel should stand in a position where the motor can be injured without being lifted.

6)Hazard source: The personnel are improperly matched when taking the shield and dialing the opposite wheel.
Description of risks and their consequences: prone to tools and removal of shields to injure people.
Pre-control measures: The mine maintenance fitter selects the appropriate tool according to the size of the bolt; The mine maintenance fitter is commanded by a special person when taking the shield, and the two people cooperate closely to remove the shield.

7)Hazard source: The order of operation to remove the bearing is incorrect.
Description of risks and consequences: It is easy to cause personal injury.
Pre-control measures: Mine maintenance fitter uses the wheel puller to pull out the motor side half shaft;Unscrew the bearing end cover fixing bolt, remove the end cover, use the hoisting chain to hang the motor output shaft end, and then unscrew the disc shaft Fix the bolts, remove the disc-shaped bearing housing, and use the dial to pull out the bearing.

8)Hazard source: The bearing is not installed as required, the end cover is not inspected as required, and the bearing is not oiled.
Description of risks and consequences: Easy to cause bearing damage.
Pre-control measures: Clean the output shaft of the motor with kerosene, and heat the new bearing to about 150 degrees Celsius with the oil basin, quickly install the heated bearing in place, and then cool the bearing;Install the disc-shaped bearing seat and fasten the fixing bolt After adding the proper amount of butter to the bearing, when installing the end cap, it is necessary to check whether the end cap has cracks, the bearing end cover of the notch cover and the bearing end cap fixing bolt; Mine maintenance fitter, when installing the end cap, must check Whether the end cover has cracks or notches; Mine maintenance fitters must load the bearings after installing the bearings.

9)Hazard source: Replace the belt conveyor motor bearing.
Description of risks and consequences: It is prone to injury or hoods.
Pre-control measures: After the mine maintenance fitter installs the opposite wheel, the guard must be installed.

10)Hazard source: The anchor bolts are not fastened to the wheels.
Description of risk and its consequences: It is easy to cause damage to the motor bearing and the opposite wheel.
Pre-control measures: The mine maintenance fitter must fasten the bolts of the wheel guard to the spring pad and flatten it.

11)Hazard Source: Field tools are not cleaned.
Description of risks and consequences: Easy to cause damage to the belt.
Pre-control measures: Mine maintenance fitters must clean up the tools on site before starting the machine, confirming that all tools are fully collected and free of debris.

12)Hazard Source: Persons around the equipment were not inspected.
Description of risks and consequences: Easy to be pulled by a rotating belt.
Pre-control measures: The mine maintenance fitter checks the personnel around the belt before starting the machine, and confirms that there is no personnel before starting.