Securing the Roadway

Securing the Roadway after Blasting with the Paus Scaler 853 S8

Underground blasting operations naturally cause loosening of the rock. This entails dangers with loose splitters of material, which can fall down especially from the roof. The roof and the ribs are worked to counter this danger. Traditionally this was carried out by hand with the rock being tackled with a scaling bar. Based on the noise and the appearance of the rock the experienced tunneller or miner can identify the places, which are potentially dangerous and remove loose parts with the scaling bar. This report presents a method which allows scaling to be carried out mechanically from a safe working position.

1. Barring down and Scaling – important for Securing the Excavation

Scaling or barring down the roof and ribs underground largely serves to secure the excavation following blasting and for maintenance. It thus represents an essential working step for safe tunnel driving and production in mines. This work calls for a great deal of experience in handling the tools that are applied – both by hand and mechanically – and at the same time depends on good geological and rock-mechanical knowledge. An experienced tunneller or miner does not simply rely on his sense of sight in this respect; his sense of...

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