The decommissioning of main upcast shaft of the Barbora mine in Karviná, Ostrava-Karviná Coalfield, Czech Republic

Abstract

This contribution solves the problems of decommissioning the main mine working of underground mine, namely the upcast shaft of closed Barbora Mine in the Ostrava-Karviná Coalfield. It deals with explosion-proof sealing of the decommissioned shaft by stoppings on individual mine levels, the dismantling and removal of shaft equipment, the demolition of shaft building, the preparation of shaft itself for backfilling operations, the installation of safety monitoring sensors, the establishment of sites for air composition sampling, the technology for shaft backfilling and the construction of safety gas-tight slab on the surface.

Keywords

• Mining
• shaft – main mine working
• mine atmosphere
• stopping
• sampling
• backfilling material
• cement-fly ash mixture
• safety cap
• vent pipe