Post on 26-Dec-2015
transcript
Eliminating and Eliminating and ControllingControlling
Dust & Noise Dust & Noise HazardsHazards
July 2002
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EXPOSURE CONTROLS
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EFFECTIVE EXPOSURE CONTROL
Controls the hazard - reduces health threat
Promotes ability to work in comfort
Protects all potentially exposed workers
The control itself should not create a hazard.
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POINTS OF CONTROL
Miner
Path
Sourceof contaminant
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TYPES OF CONTROLS
ENGINEERING
ADMINISTRATIVE
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Preventing Hazard Generation
ENGINEERING
SUBSTITUTION
PROCESS CHANGE
PURCHASE EQUIPMENT
THAT WON’T PRODUCE
HAZARDS
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Engineering ControlsEngineering Controls
Design right to start with!Redesign as necessaryMaintain UtilizeSample to determine effectivenessTrain the workersUpdate with technology changes
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ENGINEERING REDESIGN EXAMPLES
AUTOMATE PARTS OF THE PROCESS
FOR EXAMPLE: COMPUTERIZED LOADING
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Engineering Controls
Operator redesigns crusher controls; puts operator in booth.
Reduce speed of moving parts.
Redesign spouts in bagging.
Use water, mist or fog sprays.
Replace metal parts with nonmetal parts.
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Engineering Controls (used after hazard is
generated)
Ventilation» General
» Dilution Ventilation
» Local Exhaust
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LOCAL EXHAUST VENTILATION
HOODSHOODS - Captures substance DUCT WORKDUCT WORK - Carries substance away FANSFANS - Move AIR through duct work AIR CLEANERAIR CLEANER - Removes substance and
removes it before air returns to environment MAKE-UP AIRMAKE-UP AIR - Replace air exhausted by
system
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Check seals
Regular Inspection and MaintenanceRegular Inspection and Maintenance
Is Absolutely Necessary!
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Something’s not right!Something’s not right!
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ENCLOSURE & ISOLATIONENCLOSURE & ISOLATIONEnvironmental Cab
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Engineer Out Path Noise with Barriers
INCREASE DISTANCE
AT THE SOURCESelect quiet equipmentReduce impact or impulsive forcesReduce speed in machines
IN THE TRANSMISSION PATHSeparate noise and receiverUse sound absorbing materials
Barrier ConceptBarrier Concept
Shadow
Zone
DiffractedDiffracted
PropagatedPropagatedReflectedReflected
Noise SourceNoise Source
BarrierBarrier
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Work PracticesWork Practices
Vacuums with HEPA filters
NO dry sweeping
Use wet methods X
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ADMINISTRATIVE ADMINISTRATIVE CONTROLSCONTROLS
ROTATE WORKERS / WORK SCHEDULES
ESTABLISH REGULATED AREAS
WARNING SIGNS & BARRICADES
EDUCATION & TRAINING
ELIMINATE THE JOB
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HAZARD TRAINING INCLUDES:
HAZARDS OF MATERIAL OR PHYSICAL AGENT
HAZARD RECOGNITION
EFFECTIVE CONTROL MEASURES
PPE PROGRAMS
•INVOLVES:
-SUPERVISORS
-MINERS
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ACCOMPLISHED BY:ACCOMPLISHED BY:
FORMAL TRAINING
HEALTH AND SAFETY MEETINGS
BOOKLETS
SIGNS AND LABELS
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NOISE HAZARDOUS AREA
HEARING PROTECTION
REQUIRED
WARNING SIGNS
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SUPERVISOR SUPERVISOR EDUCATIONEDUCATION
WHEN / WHERE TO GET HELP
LEGAL / CORPORATE RESPONSIBILITIES
COST / BENEFIT INFORMATION
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MINER EDUCATIONMINER EDUCATION
SAFETY AND HEALTH HAZARD EDUCATION
OPERATING PROCEDURES - EFFECTIVE USE OF CONTROLS
UNDERSTANDING MAINTENANCE NEEDS
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MINE OPERATOR MUST BE COMMITTED!
FURNISH SAFE / HEALTHY FACILITIES
TRAIN MINERS
CONTROL HAZARDS
MONITOR THE WORKPLACE
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MINERS:
OBSERVE RULES - work practices, cleanup, hygiene
NOTIFY SUPERVISORS OF HAZARDOUS CONDITIONS AND PROBLEMS WITH CONTROL MEASURES
MAINTENANCE USE REQUIRED PPE
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CONTROL EXPOSURES AT POINT OF WORKER
JOB ROTATION
ENCLOSURES/Booths/Cabs
TRAINING & EDUCATION
PERSONAL MONITORING
MAINTENANCE PROGRAMS
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PERSONAL PROTECTIVE EQUIPMENT
HEALTH HAZARD CONTROL
RESPIRATORS
HEARING PROTECTION
COVERALLS, GLOVES, BOOTS, GLASSES, HARD HATS
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Use PPE Use PPE
WHEN……. Other controls are being
developed and installed Additional protection is
needed The hazards can’t be
controlled any other way
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AIRBORNE CONTAMINANTS: 56/57.5005
NOISE: Part 62
DRILL DUST CONTROL: 58.620
MSHA REGULATIONS30 CFR