Guaranteed Equipment -Peabody (Colloidal Plant)



Peabody – Hillside Mining
West Virginia, USA

4 m3/hr


  • Conceptual Co-Design
  • Mechanical Engineering
  • Design & Supply of Control System
  • Supply/Fabrication of Equipment
  • Supervision of Equipment Installation
  • Commissioning and Training


  • 150 litre Colloidal Mixer
  • 750 litre Agitation Tank
  • Slurry Aagitator
  • Grout Discharge Pump
  • Automated PLC/MCC Control System
  • Pneumatic Control System
  • All Required Piping and Valving

This specialized plant, co-designed by Team Mixing Technologies utilizes colloidal mixing to automatically produce a foam grout for backfilling auger holes in previously-mined coal beds in West Virginia.

Self-contained and highly mobile with its own generator, this trailer-mounted unit is supplied with bulk cement and water to batch cementitious slurry using a colloidal mixer. This slurry is then held in suspension in an agitator tank, serving as a reservoir. As backfilling proceeds, this slurry is discharged while foam is injected into the pipline blended via a static mixer. A lobe pump is used to pump the finished foam grout as far as 1,000 feet. Special seals are used to contain the foam grout at the face of the mine highwall at each auger hole. The use of foam grout permits backfill to be injected at considerable distances underground. Following backfill, the coal beds may be re-mined adjacent to and behind the filled auger holes using new continuous miner technology.

This plant is a hybrid design, combining the accuracy of grout batching with continuous foam injection at the plant output. All phases of production are fully automated and alarmed.