Development of mix designs for the production of backfilling materials

Development of mix designs for the production of backfilling materials based on industrial wastes for hydraulic methods and mechanical methods (drop backfilling and backfilling with big bags) including

Determination of the permissible operating range according to the ordinance on the health protection in mining
Adjustment of the necessary parameters of the process technology (rheology, processing time, dust formation)
Rejection of heating effects and the gas formation
Detection of the geo-mechanical suitability
Detection of the tolerance against the host rock

Determination of the flow extent of a viscous slurry backfilling mixture

Test sample after setting of hydraulic backfilling

Test sample of a hardened backfilling product

Continuous development and testing (since 1993) of mix designs for hydraulic, drop backfilling and big bag backfilling made from mineral wastes for the backfilling plants

Scientific and technical investigations designing backfilling materials for the Polish hard coal mining by order of the UTR GmbH, Gladbeck, 1995
„Backfilling with viscous slurry Werra“: Development of backfilling materials based on rock salt, industrial wastes, salt solutions and binders; Co-operation in a working team under project direction of the Kali und Salz AG; BMFT-Project, 1994 – 1996
Development of a filling mortar based on coal ashes and filter dusts for stabilizing near-surface cavities in the area of the hard coal mining by order of MineralPlus GmbH, Gladbeck, 1999
Development of waste based mix designs for backfilling and waste disposal in the underground disposal Niederrhein in Borth after the viscous slurry process by order of Trieneckens AG/RWE Umwelt AG, 2001 – 2002