Transcript Silica - Safety Groups

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Equipment exhaust & engine / motor heat
Ventilation fans
Oxidation of sulphides
Blasting
Rock temperature
Auto compression of air
ROCK TEMPERATURE
1.5°C
#1 Mine
AUTO COMPRESSION
850m
12.2°C
#2 Mine
Dry Bulb Increase
~ 6°C / 1000m
1400m
17.2°C
Wet Bulb Increase
~ 4°C / 1000m
#3 Mine
Phase I
#3 Mine
Phase II
WBGT Increase
~ 4.6°C / 1000m
2070m
24.3°C
Block 1
Mine D
Stage 1
Block 2
Block 3
31.9°C
Mine D
Stage 2
3100m
34.7°C
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General name for several medical conditions caused by
working in hot areas.
Hyperthermia, an elevated body temperature due to failed
thermoregulation, occurs when the body produces or absorbs
more heat than it can dissipate.
Caused by prolonged exposure to excessive heat or heat and
humidity.
Occurs when heat is combined with hard physical labour, loss
of fluids, fatigue, or some medical conditions.
It may lead to heat related illness, disability or even death.
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Dehydration
Fatigue
Lack of
acclimatization
Obesity
Drug or alcohol use
Previous heat stroke
Kidney or heart
disease
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Type or amount of
clothing
Age (>40 yrs)
Some medications (such
as antihistamines, cold
medicines,
amphetamines)
Exposure to high
temperatures while not
working
TYPE OF HEAT
STRESS
SYMPTOMS
Heat Fatigue
Impaired motor skills.
Heat Rash
Sweaty skin, red blotches and
extreme itchiness, prickling
sensation on skin.
Heat Cramps
Painful muscle spasms (usually
larger muscles), hard painful
lumps, sweaty skin.
TYPE OF HEAT
STRESS
SYMPTOMS
Heat Exhaustion
Headache, nausea, clammy or
pale skin, rapid pulse, weakness,
thirst and giddiness.
Heat Stroke
Unconsciousness (or, if
conscious, confused, staggered
walk, agitated), hot dry skin or
(rarely) sweating, rapid pulse,
body temperature of 41 degrees
Celsius or higher.
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Employers have a duty under section 25(2)(h) of the
Occupational Health and Safety Act to take every precaution
reasonable in the circumstances for the protection of a
worker. This includes developing hot environment policies
and procedures to protect workers in hot environments due
to hot processes or hot weather.
For compliance purposes, the Ministry of Labour recommends
the Threshold Limit Values (TLVs) for Heat Stress and Heat
Strain published by the American Conference of
Governmental Industrial Hygienists (ACGIH). These values are
based on preventing unacclimatized workers' core body
temperatures from rising above 38°C.
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Developed by the Heat Stress Committee:
• the Occupational Health Centre
• elected Health and Safety representative
• Engineering
• an external Occupational Hygiene consultant.
In accordance with the Occupational Health and Safety Act
and Regulations for Mines and Mining Plants.
With the objective of ensuring all employees subjected to
high temperatures are protected from undue risk associated
with the total heat load while maintaining safe production
levels.
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Applies to:
• all property owned by Kidd Mine and Properties under its
jurisdiction
• all Kidd Mine Employees, Contractors and Subcontractors
who conduct work in high temperature environments and
their supervisors.
Applies to every work place where the estimated Wet Bulb
Globe Temperature exceeds 27.5oC called a “high temperature
environment”.
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Employer
Supervisors
Ventilation (Engineering)
Workers
Occupational Health Centre
JOHSC
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Employer to ensure:
• Supervisors and workers are notified of their
responsibilities
• Proper training on the hazards of hot environments;
• Appropriate resources, procedures, equipment and
materials are provided & maintained to protect the health
and safety of all workers;
• All components of the Heat Stress Program are
implemented
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Supervisory roles have the primary responsibility for
controlling access to and authorizing work in high
temperature environments.
Supervisors to:
• Conduct daily estimated WBGT & determine appropriate
work/rest regimens for their workers;
• Complete the High Temperature Work Record, notify
affected workers and complete their Neil George Card and
provide this record to the CPCR (control room) at the end of
each shift;
• Ensure that workers have been trained in the hazards of
working in hot environments;
• Promptly report all known or suspected heat related
incidents to the Occupational Health Center; and
• Take every reasonable precaution to protect worker health.
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Workers to:
• Participate in required departmental training sessions;
• Be familiar with high temperature environments hazards;
• Use the appropriate equipment and materials and to follow
the work/rest regimen;
• Consult their physician on personal risk factors that may
affect heat tolerance;
• Be aware that lifestyle factors affect the health effects of
heat stress and modify lifestyle and/or work;
• Promptly report any known or suspected heat related
symptoms;
• Stop work and report if feeling heat stress-related
symptoms;
• Request supervisor to take temperature measurements.
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Occupational Health Centre to:
• Provide ongoing health education;
• Record all heat related incidents as such in the
accident/incident report.
Joint Health & Safety Committee to:
• Annually review the Heat Stress Program implementation;
• Make recommendations to the employer for improvement.
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Use an instrument capable of determining the WBGT;
Weekly measurement taken by ventilation technicians to
determine the actual WBGT where temperatures exceed 26ºC;
Temperatures posted on surface on a weekly basis;
Supervisors take daily estimates of the WBGT where
temperatures may exceed 26ºC;
If WBGT temperatures are above designated limits, the
supervisor determines the work/rest regimen;
This information is recorded on the High Temperature Work
Record, on each worker’s Neil George Card and then provided
to CPCR at the end of the shift;
Ventilation technicians record the temperature from the
supervisor’s record on to the appropriate map in the WBGT
glass cabinets. This information is used to modify the
program annually.
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Wet Bulb Globe Temperature Index
(WBGT)- Measures Human Heat
Stress Exposure
Dry Bulb (DB) - Measures Ambient
Air Temperature
Wet Bulb (WB) - Measures Cooling
Effect of Air Movement
Black Bulb Globe (GT) - Measures
Radiant Heat
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RH300 Digital Psychrometer by Extech
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Carried by all Supervisors
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Available through our safety
dispensing (vending) machines
equipment
Inexpensive & disposable
Should be replaced every 6 months (reduced
accuracy)
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Determines Wet and Dry Bulb Temperatures
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WBGT = 30% Dry Bulb + 70% Wet Bulb
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Light:
• Equipment operation
• Light construction work
• Deckman
• Electrician terminating
cables
Moderate:
• Explosives loading
• Installing flexible ducting
• Moderate construction work
• Installing pipes
• Mechanics
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Heavy:
• Jackleg operation
• Heavy construction work
• Diamond driller rod pulling
• Alimak set up or stripping
• Scaling
• Installing ground support
• Removing electrical wires
Very Heavy:
• Shoveling
• Manual muck removal
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If the job task is not covered in the work classification, the
following definitions are used for determining the workload
of a job task.
• Light: sitting with moderate arm and leg movement;
welding; using small power tools; standing with some
walking about.
• Moderate: rapid or forceful arm movements; walking with
moderate lifting/pushing; hammering nails; tying rebar
• Heavy: heavy assembly work on a non-continuous basis;
intermittent heavy lifting with pushing or pulling; shoveling
dry sand; walking slowly upgrade.
• Very heavy: heavy lifting on a continuous basis, walking
steadily upgrade.
Work Demands
Work / Rest Regimes
Light
100% Work
75% Work
25% Rest
50% Work
50% Rest
25% Work
75% Rest
Stop work and correct
29.9
31.0
28.0
29.0
27.5
Very
Heavy
-
32.0
30.0
29.0
28.0
32.5
31.5
30.5
30.0
32.6
31.6
30.6
30.1
Moderate Heavy
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Acclimatization is the ability to work effectively in
the heat by gradually getting used to your
environment.
◦ 20% per day increase for new workers.
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Some workers take longer than others to become
fully acclimatized (individual factors).
◦ A schedule is in place for becoming acclimatized
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After 7 days off of work your resistance to heat
decreases and have to be re-acclimatized upon
your return.
2010
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Lunch should be light and cool.
Critical Step: Replace the water and salt that is lost
through sweat. Drink plenty of water throughout
the day ( at least 1 Litre per Hour).
Avoid alcohol & caffeine as it dehydrates the body.
Water is the best replacement.
2010
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A worker may lose up to 7 to 10 litres of water in
sweat over one shift.
Water intake must equal the sweat produced.
Most workers drink less fluid than needed.
Suggested amounts 250 ml every 20 minutes (8L
per day).
Ensure the refuge stations are well stocked with
bottled water and encourage workers to drink
water.
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Monitoring the color of urine is a good way of
evaluating your hydration level
2010
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An essential aspect of heat stress management is the
education and training of all personnel with potential
exposure to the underground heat environment;
Kidd Training Programs:
• Job Induction – Heat Stress Awareness and Questionnaire
• Heat Stress Review
• Heat Stress Test
• Heat Stress Training for Supervisors
• Supervisor Heat Stress Test
• Estimated WBGT Procedures for Supervisors
• WBGT Meter Test Procedure
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A mandatory pre-hire medical surveillance is done
for all personnel who are to be assigned to high
temperature jobs.
An optional surveillance program is provided for all
workers who would like to have heat-related health
symptoms identified and/or monitored.
Heat stress incidents are placed in the employee’s
medical file.
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Temperature monitoring reports and associated work/rest
regimes
Heat-related incident/accident reports
Training records
Medical surveillance records
Program review and modification records
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Physical discomfort
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Irritability and anger
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Poor judgment
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Slower mental and physical reactions
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Diverting attention from the job
2010
Thank you for your attention
and I’ll be pleased to
address any comments or
questions!