Safety Alert

What Happened

Two workers entered the primary crusher chamber to clear a blockage without completing the mandatory confined space entry permit. The atmosphere had not been tested, and the confined space attendant was not in position. The workers were discovered by the Shift Supervisor during a routine area inspection. Atmospheric testing conducted after the event revealed oxygen levels at 18.2% — below the safe minimum of 19.5%.

Why It Matters

Confined space incidents are one of the leading causes of multiple fatalities in mining. Low oxygen environments can cause loss of consciousness within seconds and death within minutes. This event represents a critical procedural breakdown — the workers bypassed multiple administrative controls designed to prevent exactly this scenario.

Immediate Actions Required

1. 1Immediate stand-down for all confined space work pending a full review of confined space entry procedures
2. 2All confined space entry points to be physically locked and require supervisor key access
3. 3Mandatory refresher training on confined space entry procedures for ALL site personnel within 48 hours
4. 4Atmospheric monitoring equipment to be calibrated and verified — daily pre-use checks made mandatory
5. 5Review and update the confined space register to ensure all spaces are identified and correctly classified

Key Learning

A confined space that looks safe can kill you. You cannot see, smell, or taste an oxygen-depleted atmosphere. The permit system exists because the hazard is invisible. Never enter a confined space without a valid permit, tested atmosphere, and an attendant watching over you.

Discussion Points for Toolbox Talk

• •Why do you think workers sometimes bypass confined space entry permits? What pressures might lead to that decision?
• •What would you do if you saw a colleague entering a confined space without a permit?
• •Can you identify all the confined spaces in your work area? How are they marked and controlled?