Strengthened backfill material for closure of the ČSA 2 and Jan shafts

Summary

DIAMO is procuring, under a single-supplier framework agreement, supplies of strengthened backfill material with strengths of 2 MPa and 5 MPa, together with C 12/15, C 16/20, C 25/30 and C 30/37 concrete mixes. Deliveries are for the closure of the ČSA 2 and Jan shafts, to designated handover points at the former ČSA mine in Karviná-Doly. The agreement is planned to run from 9 December 2026 to 29 February 2028, with a possible extension until 28 February 2029.