K+S Entsorgung GmbH
Weltkarte

Stacking backfill

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In low-ceilinged caverns back-filling is done by stacking wastes packed in big bags. In order to create a direct connection with the pillars and to maximise the supportive effect, all gaps between the big bags and between big bags and pillars are filled with salt. Due to the conditioning and the packaging it is possible to use more strongly contaminated wastes, such as:

  • filter dusts and solid  flue gas treatment residues from waste incineration plants,
  • incinerated clearing sludges or
  • deposit seepage residues. 

Underground-reutilisation facility Hattorf-Wintershall

Delivery and packing

  • in bulk, in silo truck
  • if need be, big bags by truck

Certificates

  • Qualified waste management facility (Efb)
  • QM-system in accordance with DIN EN ISO 9001

Annual capacity: 250,000 tons

Location Hattorf

  

Location Wintershall

Reutilisation process

  • Pneumatically transportable wastes are transported above-ground in stationary silos and are conditioned at a mixing plant.
  • Packed in big bags, this mixture hardens within a very short time.
  • Via a shaft these big bags are transported below-ground, and are stacked in the caverns to be back-filled.
  • All gaps are filled with salt.
  • Wastes delivered in big bags are discharged and conditioned, if need be, or are stacked directly.
  

Reutilisation process

  • Wastes delivered by silo lorries are transshipped in stationary silos and are packed into big bags above-ground..
  • Plate vibrators serve to compact the wastes inside the big bags.
  • Via a shaft the big bags are transported below-ground.
  • After stacking in the caverns to be back-filled, all gaps between big bags and between big bags and pillars are filled with salt.
  • Suitable wastes may also be delivered already packed in big bags.

Beginning of operation: 1994

  

Beginnig of operation: 1993
© K+S Entsorgung GmbH