This document is a presentation on mine machinery for a course at the University of Liberia. It contains sections on bucket capacity, front end loaders, 90-ton dumpers, excavators, electric shovels, the difference between long and short tons, tonnage factor, why mine machinery is studied, and references. The presentation was given by student Zogbo Akoi to lecturer Shri. Adolphus M.G.D. Gleekia and covers key concepts and equipment used in mining.

1. MINE MACHINERY PRESENTATION
DEPARTMENT OF MINING ENGINEERING
COLLEGE OF ENGINEERING
UNIVERSITY OF LIBERIA
FENDALL CAMPUS
NAME: ZOGBO AKOI
ID#: 79048
COURSE TITLE: MINE MACHINERY (MINE-417)
SEMESTER-ONE 2021/2022
PRESENTED TO: SHRI. ADOLPHUS M.G.D. GLEEKIA
SENIOR LECTURER/SENIOR MINING ENGINEER UL
DATE: 09/29/2022

2. TABLE OF CONTENT
● BUCKET CAPACITY
● FRONT END LOADER
● 90-TONS DUMPER
● EXCAVATORS
● ELECTRIC SHOVEL
● DIFFERENCE BETWEEN LONG TON AND SHORT TON
● TONNAGE FACTOR
● WHY STUDY MINE MACHINERY
● REFERENCES

3. BUCKET CAPACITY
Bucket capacity is a measure
of the maximum volume of
the material that can be
accommodated inside the
bucket of the backhoe
excavator.

4. FRONT END LOADER
A loader is a heavy
equipment machine used in
construction to move or load
materials such as soil, rock,
sand, demolition debris, etc.
into or onto another type of
machinery (such as a dump
truck, conveyor belt, feed-
hopper, or railroad car).

5. 90-TONS DUMPER
A dumper is a vehicle designed
for carrying bulk material, often
on building sites. Dumpers are
distinguished from dump trucks
by configuration: a dumper is
usually an open 4-wheeled
vehicle with the load skip in
front of the driver, while a dump
truck has its cab in front of the
load.

6. EXCAVATOR
Excavators are heavy construction
equipment consisting of a boom,
dipper, bucket and cab on a
rotating platform known as the
"house". The house sits atop an
undercarriage with tracks or
wheels. They are a natural
progression from the steam
shovels and often mistakenly
called power shovels.

7. ELECTRIC SHOVEL
Also referred to as a
mining rope shovel or
electric shovel, an
electric rope shovel is
designed to dig and
load material in a
surface mines.

8. DIFFERENCE BETWEEN LONG TON AND SHORT TON
LONG TON:
1. British is a long ton.
2. Equal 2240 pound.
SHORT TON:
1. US is a short ton.
2. Equal 2000 pound

9. TONNAGE FACTOR
The tonnage factor provides the mechanism for
the conversion from volume of ore to weight of
ore. In the English system, the tonnage factor is
normally expressed as cubic feet per ton of ore.
In the metric system, the tonnage factor is the
specific gravity of the ore.

10. HOW TO CALCULATE TONNAGE FACTOR?
The volume divided by the
volume-per-ton factor gives the
tons of ore in the block.
Multiplying the tonnage in each
block by its average assay
value, adding the products, and
dividing this sum by the sum of
the tonnages gives the average
assay value of all the blocks.

11. WHY STUDY MINE MACHINERY?
We study mine machinery because, this
course deal with the basic construction,
operation and maintenance aspects of
machines used in mining and quarrying
industry so that a graduate mining engineer
can select the right equipment for specific job.

12. REFERENCES
● https://en.wikipedia.org/wiki
● https://www.vocabulary.com/dictionary/power%20shovel
● https://www.definitions.net/definition/excavator

13. THE END!