Fatal at Evander Position of now deceased Position of helper Position of rigger
10t Skip
Platform
10t Skip
Position of fitter
1t Spillage skip Steps to shaft bottom
Workshop
Gate
Catwalk
www.harmony.co.za
6
Fatal at Evander
Skip guides
Helper with welding helmet
Spillage skip
Position of boilermaker
Dolly wheel
www.harmony.co.za
7
Fatal at Evander
Findings • No voltage reducer on welding machine (sub standard) • Welding done in confined space • Boilermaker’s clothing was wet • Boilermaker was laying his back in the skip
Amendment to operational procedures • Risk of shock - 50V d.c. • Risk of water - Diesel driven
www.harmony.co.za
16
Welding in Hazardous Locations
www.harmony.co.za
17
Agenda
1
Fatal at Evander
2
Effects of Current on Human Beings
3
Welding in Hazardous Locations
4
Electrical Procedures
5
Issue Base Risk Assessment
6
Confined Space Procedure
www.harmony.co.za
18
Electrical Procedures
Amendments • DC Welding • Requirements of voltage reducers
www.harmony.co.za
19
Agenda
1
Fatal at Evander
2
Effects of Current on Human Beings
3
Welding in Hazardous Locations
4
Electrical Procedures
5
Issue Base Risk Assessment
6
Confined Space Procedure
www.harmony.co.za
20
Issue Base Risk Assessment
References • Harmony operational procedures • Occupational Health and Safety Act • American OSHA legislation • Other mining houses
www.harmony.co.za
21
Issue Base Risk Assessment
Method • Reverse engineer hazards, risks, mitigation • Further identify hazards and risks • Assess and make recommendation for high risks • Workshop recommendations
www.harmony.co.za
22
Agenda
1
Fatal at Evander
2
Effects of Current on Human Beings
3
Welding in Hazardous Locations
4
Electrical Procedures
5
Issue Base Risk Assessment
6
Confined Space Procedure
www.harmony.co.za
23
Confined Spaces Procedure
Solution Enhance existing HIRA through guidelines in a procedure dedicated to confined spaces
Major Topics • Defining confined spaces • Hazard and risk identification • Mitigation
www.harmony.co.za
24
Confined Spaces Procedure
Definition A space which due to its layout restricts movement of people or ventilation flow into, inside or out of that space and which is not intended for continuous occupancy.
www.harmony.co.za
25
Confined Spaces Procedure
Including • Mills
• Sewage sumps
• Shaft bottoms
• Sewage manholes
• Conveyances
• Enclosed reservoirs
• Tanks
• Trenches deeper than two meters
• Vertical dams
• Boiler shells
• Silos
• Sealed underground cable trenches
• Ore passes
• Fume ducts
• Chutes www.harmony.co.za
26
Confined Spaces Procedure
Risk identification Hazard Limited Space
Limited ventilation
Hazardous substances Bystanders Electricity Stored energy
Risk Cramps and fatigue Persons getting stuck Inability to escape quickly Inadvertent contact with other hazards Claustrophobia Heat stress Asphyxiation Inhalation of toxic fumes Explosions Exposure to hazardous substances Interference with work Unpreparedness for exposure to risks Electrocution Uncontrolled release of energy www.harmony.co.za
27
Confined Spaces Procedure
Mitigation If at all possible work should be done outside of confined spaces
www.harmony.co.za
28
Confined Spaces Procedure
Mitigation Risk / Hazard
Minimum Requirement
Asphyxiation
Force ventilation or buddy with life line Gas monitoring
Toxic or explosive gasses
Ventilation clearances
Incapacitation
Buddy with life line
Bystanders
Barricades (not in escape route) or buddy
Heat stress
Temperature monitoring
Electricity
All appliances earthed or less than 50V
Stored energy
Lock out
Fatigue
Regular breaks www.harmony.co.za
29
Agenda
1
Fatal at Evander
2
Effects of Current on Human Beings
3
Welding in Hazardous Locations
4
Electrical Procedures
5
Issue Base Risk Assessment
6
Confined Space Procedure
www.harmony.co.za
30
Implementation
Refresher Training E-learning Occupations linked to procedures Questions developed from amendments Procedures used as learning guides
