Question 12
- List four mining equipment
- Name two states each in which each of the following minerals can be found in commercial quantities in Nigeria
- limestone
- tantalite
- coal
- State five stages in the life of a mine
This is undoubtedly one of the most popular question. Few candidates were able to identify mining equipment and mention states in Nigeria were the listed minerals are found. However, candidates performed poorly in answering question 12 (c) “state five stages in the life of a mine”. The question requested the candidates to give the following points:
(a) Mining Equipment
- Pulley system (main & hopper)
- Hand shovels
- Excavators (mini and large)
- Blasting machines
- Jackhammer or jackleg
- Scraper
- Mine car
- Hydraulic pump
- Water pump
- Chute system (to remove muck)
- Sheave (like motorcycle wheel)
- Compressors
- Power generators
- Diesel engines
- Block and tackle
- Cable hook
- Wheel barrow
- Head pans
- Spade
- Mine Hoist Drive
- D.C. Ward-Leonard Control
- Selection of Hoist
- Hoist Motor Rms Horse Power
- Friction Hoist Rms Hp
- Ventilation Fan
- Transformers in Mines.
- Crushers – Jaw, gyratory, hammer mill
- Tumbling mills – ball mill, rod mill
- Shaking table
- Sluice boxes
- Jigs
- Screens
- Stamp mills
- Flotation machines
- Ovens
- Furnaces
- Crucibles
- Scrubber
- Wheel barrows
- Head pans
(b) States in which the following minerals can be found in commercial quantities in Nigeria
- Limestone – Cross River, Benue, Niger, Nasarawa, Enugu, Ogun, Edo, Benue, Gombe, Sokoto, Adamawa, Ebonyi, Imo, Yobe
- Tantalite – Nasarawa, Kaduna, Kwara, Kogi, Oyo
- Coal – Enugu, Kogi, Benue, Nasarawa, Gombe, Edo, Anambra, Abia, Ondo
(c) Stages in the life of a mine
- Prospecting
- Exploration
- Development
- Exploitation
- Closure
- Post Closure