Liquidation of shafts' workings with the use of the mobile installation

Liquidation of unnecessary shafts and associated shaft workings is dictated by the assurance of broadly understood security. In Poland, the most common method of liquidation shafts is filling them with various types of materials. The technology of shaft decommissioning and the selection of fill materials depend primarily on the condition of the excavation and its equipment, existing connections with horizontal excavations and the degree of water and gas hazard. Properly selected materials and technology must ensure the stability of the liquidated shaft in a long time horizon. A common solution applied in the Polish mining industry is filling the shaft with mine stone or other rock material combined with its washing with ash-water mixtures or with interlayer of concrete layer in order to stabilize the whole charge. The article presents the benefits resulted from the possibility of using a mobile installation in the process of the liquidation the shaft's excavation.