EM 411 - Pre-assessment

Which of the following equipment is used for loading?

• Ramcar

• FEL

• Grader

• Tramway

Which aspect/s is/are considered in selecting mine equipment for haulage systems

• seam height paramater

• productivity/availability

• miner utilization

• rock mass rating

What are the factors that affect the design of the diameter of shafts in underground mining?

• airflow requirement

• hoist systems

• size of LHD

• all of the choices

These are commonly used for transporting ore via hoist system.

• cages

• skips

• counterweights

• all of the choices

Which is not a type of skip in UG mining?

• fixed-body

• swing-out body

• kimberley

• fixed-swing body

An accessory of the skip where ore and waste are transferred from the mine to the skip

• loading pockets

• ore pockets

• ore pass

• spill pockets

In ventilation, this is the internal friction if air.

• viscosity

• obstruction friction

• resistance

• obstruction

Which is not an example of an obstruction in the path of airflow

• equipment

• conveyors

• viscosity

• the rubbing surface of airway

These ventilation control course airflow to intended locations

• ventilation duct

• shaft

• raise

• airflow series

In a ventilation lay-out, a minimum of 300,000 cfm air has to be carried throughout the mine with an air velocity of 600 fpm. Determine the number of entries required if each airway has an opening of 100 sq.ft.

• 8

• 5

• 10

• 6