This document provides information about mine machinery presented by Emmanuel Tokpah II for his Mine Machinery course. It discusses bucket capacity and formulas, components of front end loaders and dump trucks, types of excavators including diagrams, electric shovels and their components, the difference between long and short tons, and how to calculate tonnage factor. Images are provided to illustrate the various machines. References are listed at the end.

1. MINE MACHINERY PRESENTATION
DEPARTMENT OF MINING ENGINEERING
COLLEGE OF ENGINEERING
UNIVERSITY OF LIBERIA
FENDEL CAMPUS
Name: Emmanuel Tokpah II
ID#: 85903
Course: Mine Machinery (Mine 417)
1st semester 2021/2022
Presented To: Shri. Adolphus M.G.D. Gleekia
Senior Lecturer/Senior Mining Engineer
DATE: 09/29/2022

2. SCOPE OF THE PRESENTATION
• BUCKET CAPACITY
• FRONT END LOADER
• XCMG-90 TONS DUMPER
• EXCAVATORS
• ELECTRIC SHOVEL
• DIFFERENCE BETWEEN LONG TON AND SHORT TON
• TONNAGE FACTOR
• REFERENCES

3. BUCKET CAPACITY
The total amount of material carried by a bucket is the amount inside
the bucket plus the amount piled on top of it. This is called the Heaped
or Rated Capacity. The amount of material piled on top of the bucket
(heap), is determined by the angle of repose of the material being
handled. The Society for Automotive Engineers (SAE), for purposes of
creating a standard for comparatively rating buckets, has defined two
different angles of repose (the steepest angle to which a material can be
piled without slumping):
• Wheel Loader Buckets; 2:1
• Hydraulic Excavator Buckets; 1:1
The dimensions of a standard bucket are about 26 x 44 x 29
(W x H x D), but the same can be customized as per the requirements
that you have. The size or the shape of bucket that you choose should
match with other components of the set.
Formula for calculating the volume of bucket capacity:
VBC = volume of bucket capacity and A = cross setional area x length
VBC = A x L

4. FRONT END LOADER
A front end loader is a large enineering vehicle used to pick up and
move material into a dump truck. It is also called a scoop loader, skip
loader or bucket loader.
COMPONENTS OF A FRONT END LOADER
Typically a front-end loader is comprised of two key components:
• Lift arms: which consist of hydraulics that provide the lift capability
and operate attachments.
• Attachments (buckets, bale spear or pitchfork)
IMAGE 1.0
FRONT END LOADER

5. XCMG-90 TONS DUMPER
A heavy mining equipment that enhance the smooth and efficient
operation during hauling and has the following characteristics:
• Loading Capacity:60,000 kg = 59 US tons or 66 metric tons
• Gross Weight: 90,000 kg = 89 US tons or 99 metric tons
• Maximum speed: 48 km/h
• Minimum Ground Clearance: 460 mm
• Curb Mass: 30,000 kg
• Over all size ( L x Wx H):
9079 x 3500 x 4000
• MODEL: XDM100
IMAGE 1.1
XCMG-90 TONS DUMPER

6. 90 TONS DUMPER
• Loading capacity of a dumper: The maximum load placed on the
bucket of a dumper for an extended period of time.
• Gross weight of a dumper: The total weight of a dumper
excluding the packaging.
• Maximum speed of a dumper: The highest rate of speed a
dumper can attain.
• Minimum ground clearance of a dumper: The vertical distance
between the ground and the lowest point of a dumper except
the wheels,when it is stationary and fully loaded.
• Curb mass of a dumper: The actual or manufacturer's estimated
mass of a dumper at normal capacity.
• Over all size of a dumper: The total size of a dumper
considering the length, width and heigth.
•

7. EXCAVATORS
Excavators are earthmoving vehicles that feature a bucket, arm, rotating cab
and movable tracks. Excavators perform a variety of functions including:
• Excavating mines
• Digging trenches
• Breaking holes
• Lifting away waste
Types of Excavator:
• Crawler Excavator: used for mining and trench digging.
• Long Reach Excavator: used in hard-to-reach areas on mining site.
• Hydraulic Excavator: used for mining and heavy digging projects.
• Wheeled Excavator: used to excavate flat/hard surfaces.
• Suction Excavator: used for underground projects , fragile digging and
debris cleanup.
• Skid Steeers: used for site clearing, and debris removal.

8. TYPES OF EXCAVATOR
• Dragline Excavator: used for surface mining, deep excavation and under-water
operations.
DIAGRAMS:
IMAGE 1.2: dragline IMAGE 1.3: hard-to-reach IMAGE 1.4: suction IMAGE 1.5: wheel
IMAGE 1.6: crawler IMAGE 1.7: hydraulic IMAGE 1.8: skidsteer loader

9. ELECTRIC SHOVEL
A power shovel or electric mining shovel used for digging and loading earth or
fragmented rock and for mineral extraction. It gives optimal turns(360°) and keeps
the operator from a safe distance to the excavation site.
COMPONENTS OF AN ELECTRIC SHOVEL
Basic parts of a power shovel include: the track system, cabin, cables, rack, stick,
boom foot-pin, saddle block, boom, boom point sheaves and bucket.
IMAGE 1.9
HYDRAULIC SHOVEL

10. DIFFERENCE BETWEEN LONG TON AND SHORT
TON
The difference between long ton and short ton is that: The long ton or
the british ton is equal to 2,240 lbs. while the short ton or the metric
ton is equal to 2,000 lbs.
Conversion Factors
• British ton: 1 ton = 2,240 lbs.
1 ton = 1,016 kg
• Metric ton: 1 ton = 2,000 lbs.
1 ton = 907 kg

11. 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 expressed s cubic feet
per ton of ore. In the metric system, the tonnage factor is the specific garvity of
the ore.
TONNAGE FACTOR CALCULATION:
Once you have calculated the surface area, then devide the tonnage by the surface
area, the desire result is the tonnage factor. Typically tonnage factors can range
from 2 – 8 tons per square inch(tons/in²), depending on the material.
where :
T = tonnage
A = surface area and
TF = tonnage factor
TF= T
A

12. REFERENCES
https://www.palinattachments.com
https://www.kau.edu.com

13. END OF SLIDE
THANKS