Overwind Impact Protection System

Advantages of the Technogrid overwind impact protection system

• Very light initial impact force
  • light catchframe (+-400kg per set of Technogrid strings)
  • progressive energy absorption properties of the Technogrid (refer to force stroke diagram)
• Predictable reaction forces relating to cage and headgear design
• Technogrids are very narrow and therefore occupyminimal space in the shaft steel work.
• Technogrid can be easily retrofitted to existing mines. Each retrofit is custom designed to suit each application.
• No maintenance requirements (recommend annual inspections

The process involved and the factors that have to be quantified in designing the over/underwind impact protection system:

• System inertia
  • winder
  • sheave wheel
  • rope
  • cage/skip (including payload)
  • counter weight
• Stroke area (stopping distance)
  • rope breaking force
• Impact speed
• Once the total system energy is calculated, theappropriate Technogrid® configuration is determined.

The Technogrids® are always installed in units in series. Additional strings can be added in parallel if required. In order to reach a practical solution, it may be necessary to adjust the stroke area.