Porcupine Northeastern Ontario Mine Safety Group Muck Through - - PowerPoint PPT Presentation

Porcupine Northeastern Ontario Mine Safety Group

Muck Through Bulkhead Incident Review June 20, 2013

Incident Review - Overview

Description Immediate Actions Taken Loss Causes Preventive Measures

Description of Incident

Day shift crew arrived at work area and noticed damage to bulkhead which was covering the collar

• f a previously driven raise

A piece of muck, approximately 3 feet long, 16 inches wide, and 8 inches thick was laying next to a forklift which had been parked under the raise Work had been on-going in this area for several weeks prior to the incident

Immediate Actions Taken

Crew identified hazard, roped off area and informed site management Cementation supervisor and client representatives assessed area Plan was developed and Job Hazard Analysis conducted to repair the bulkhead so work could continue

Plan to Repair Bulkhead to Make Work Area Safe

Day shift crew set up a tugger from the top of the raise and dropped the line through the

• pening in the bulkhead

A balloon was hoisted through the opening with an air line attached The balloon was inflated once in position Night shift crew used aerial man lift to remove broken timber and repair the bulkhead

Loss Due to Incident

Actual Loss

Minor damage to forklift Delays to scope of approximately two shifts to assess and execute plan to make area safe

Potential Loss

Personal Injury of high severity Major equipment damage

Causes of Incident

Suspected that a blast in a raise being driven near the area contributed to the large piece of muck being dislodged

Blasting between shifts did reduce the risk of injury to underground personnel Development of the 2nd raise was postponed until the bulkhead could be repaired

Bulkhead was not built to industry standards

Single layer of 3X8 timber was used

Additional Factors

Working under overhead hazards

Failure to ensure that overhead protection was sufficient to protect workers

Unaware of bulkhead specifications

Assumption was made that the bulkhead was built to industry standards

Applicable Legislation For Bulkheads

• 22. (1) For the purpose of subsection 29 (2) of the Act,

drawings, plans and specifications to be kept and maintained shall be,

(b) plans on a horizontal plane with separate drawings for each level showing all underground workings, including shafts, tunnels, diamond drill holes, dams and bulkheads;

Mine plans

ACT – 29 (2) The owner of a mine shall cause drawings, plans

• r specifications to be maintained and kept up to date not

more than six months last past on such scale and showing such matters or things as may be prescribed.

Recommendations

Management and supervision to ensure that bulkheads are built to appropriate standards before any work takes place in the area

Communications made company wide to stress this point to all projects

Quality Control program to assist where different companies work in same areas

Questions?