Raise Boring and Equipping Steelwork Quiz

Accelerators are commonly used in the concrete for shaft lining.

The shaft lining reaches right to the bottom of the shaft during sinking.

Temporary ground support at the shaft bottom usually consists of welded mesh and steel bolts.

The installation of temporary ground support is one of the easiest parts of the shaft sinking cycle.

Shotcrete is commonly used for temporary lining at the shaft bottom.

Shafts with a cross-sectional dimension of 3.7 meters or over and an inclination to the horizontal of less than 15 degrees cannot exceed a speed of two meters per second for traction.

Communication in shafts is predominantly done through telepathy due to safety concerns related to electronic devices.

Ventilation systems in shafts function to pass ventilation air into the underground workings (downcast) but not out of the underground workings (upcast).

Shafts are used as passage ways for engineering resources such as electric power cables, compressed air, and water supply columns, but not for pump columns for surplus underground water.

The shaft orepass system is primarily used for transporting personnel up and down the mine safely.

Safety measures in shafts are managed by enforcing strict regulations and ensuring proper training for all personnel.

Shafts with an inclination to the horizontal of more than 15 degrees have a speed of traction limited to two meters per second.

The main functions of a shaft include ventilation air passing, exploration of water sources, and transportation of machinery.

Shafts are essential for the raising and lowering of men and materials underground but are not involved in the hoisting of rock mined.