• About
  • Log on
  • Register
  • Contact
  • Home
  • Safety Resources
    • Incident Alerts
    • HiPos Report
    • Guidance
    • Good practice
    • Toolbox talks
    • Hot Topics
    • Other resources
    • Videos
    • Safequarry App
  • The Fatal 6
    • Overview
    • 1. Contact with moving machinery and isolation
    • 2. Workplace transport and pedestrian interface
    • 3. Work at height
    • 4. Workplace Respirable Crystalline Silica
    • 5. Struck by moving or falling object
    • 6. Road traffic accidents
  • Vision Zero
    • Overview
    • Employee Guide
    • Core Values
    • Fatal 6
  • Safer By
    • Overview
    • Safer by competence
    • Safer by association
    • Safer by design
    • Safer by partnership
    • Safer by sharing
    • Safer by Leadership
  • Public Safety
    • Summary
    • Stay Safe
    • Cycle Safe
  • Health & Wellbeing
    • Quarries Partnership - Dust
    • Mental Health & Wellbeing
    • COVID - Safer by Sharing
    • COVID MPA Resources
  • Awards
    • Enter
    • Event
    • Sponsorship
    • Guides
    • Videos
    • Entries
  • News
  • My Information
    • My Saved Files
    • My CPD Report
  • Home
  • Safety Resources
    • Incident Alerts
    • HiPos Report
    • Guidance
    • Good practice
    • Toolbox talks
    • Hot Topics
    • Other resources
    • Videos
    • Safequarry App
  • The Fatal 6
    • Overview
    • 1. Contact with moving machinery and isolation
    • 2. Workplace transport and pedestrian interface
    • 3. Work at height
    • 4. Workplace Respirable Crystalline Silica
    • 5. Struck by moving or falling object
    • 6. Road traffic accidents
  • Vision Zero
    • Overview
    • Employee Guide
    • Core Values
    • Fatal 6
  • Safer By
    • Overview
    • Safer by competence
    • Safer by association
    • Safer by design
    • Safer by partnership
    • Safer by sharing
    • Safer by Leadership
  • Public Safety
    • Summary
    • Stay Safe
    • Cycle Safe
  • Health & Wellbeing
    • Quarries Partnership - Dust
    • Mental Health & Wellbeing
    • COVID - Safer by Sharing
    • COVID MPA Resources
  • Awards
    • Enter
    • Event
    • Sponsorship
    • Guides
    • Videos
    • Entries
  • News
  • My Information
    • My Saved Files
    • My CPD Report

The Health and Safety Hub for the Mineral Products Industry - aggregates, asphalt, cement, concrete, contracting, dimension stone, lime, precast concrete, masonry, mortar, readymix, recycling, silica sand, transport & logistics

  1. Home
  2. IncidentReports
  3. IncidentView

Blasting during Freezing Conditions

LOCATION:
QUARRY
ACTIVITY:
PRODUCTION AND PROCESSING
SUB ACTIVITY:
FACE ACTIVITY
ALERT STATUS:
Normal
DATE ISSUED:
01/03/2011
INCIDENT No:
00283

TITLE
Blasting during Freezing Conditions
COUNTRY OF ORIGIN

WHAT HAPPENED

A blast took place at an Opencast Coal Quarry in West Glamorgan, South Wales, that caused flyrock to project outside the site’s 150 metre danger zone. The weather conditions were dry, sunny and freezing and that day was regarded as the coldest day during two weeks of freezing conditions.

The incident was reported to the Health and Safety Executive although it was not reportable under RIDDOR, as the flyrock did not project beyond the site boundary. No injury occurred as a consequence of this incident.

The stemming in one hole or possibly two of the holes had failed because of the extremely cold conditions. It has been custom and practice for many years to water the blast area prior to firing in order to suppress the dust. The blast area on this occasion was watered approximately 90 minutes before firing. It had been noticed that water had frozen around the drill holes.

The operating company had never before experienced this type of incident. On investigation, it was concluded that ice formed in and around the stemming and the side of the shot hole and as there was no cohesion between the stemming and the side of the shothole. The stemming was ejected on firing, in turn causing flyrock to be projected outside the danger zone.
ACCIDENT / INCIDENT IMAGES




LEARNING POINTS / ACTIONS TAKEN

The following additional controls have subsequently been introduced for blasting in freezing conditions:-

• Watering of blast areas to be suspended during freezing or near freezing conditions.

• Stockpiles of chippings to be covered with tarpaulins to prevent freezing.

• Firing to take place as soon as possible after stemming the holes.

• Danger zones to be extended in freezing or near freezing conditions.

LEARNING POINTS / ACTIONS IMAGES


LOCATION:
QUARRY
ACTIVITY:
PRODUCTION AND PROCESSING
SUB ACTIVITY:
FACE ACTIVITY
ALERT STATUS:
Normal
DATE ISSUED:
01/03/2011
INCIDENT No:
00283


Request Futher Information
Print Page
convert this page to a pdf
Go Back to Search Critera

About
Mineral Products Association, 1st Floor, 297 Euston Road, London NW1 3AD
Tel: 0203 978 3400
Email: info@mineralproducts.org
MPA Logo
Contact
  • Privacy
  • Developed by OFEC
↑