1) The document describes a continuous miner used at the Kapildhara mine in India. 2) The continuous miner is a Komatsu Joy 12CM15 model that was commissioned in 2008 and uses a cutting drum with tungsten carbide picks to continuously extract coal from the working face. 3) It can extract coal at a high rate of up to 30 tonnes per minute and was being used to extract coal from a 1.5-4.8 meter thick seam at the Kapildhara mine.

1. Presented by:-
BRAHMDEV KUSHWAHA
Admission no:-17MT002237
Industrial training seminar on
SOUTH EASTERN COALFIELDS LTD.
DEPARTMENT OF MINING MACHINERY ENGINEERING
IIT(ISM) DHANBAD
.

2. PROFILE OF THE MINE
South Eastern Coalfields Limited came
into existence on November 20th 1985
as a subsidiary of coal india.
LOCATION:-
Kapildhara mine is under Kurja sub area
lies in the eastern part of Bijuri (MP).
The mine was started on 26th June 1993.
GEOLOGY:-
The coal deposit of the project belongs to Mahanadi series of lower Gondwana
period. The mine lease of Kapildhara is 616 Hect. There are two seam, namely “A”
and “C’’. Seam A has been exhausted in April 2016.

3. Mine Specification
1. Thickness of seam 1.5 to 4.8 m
2. Dip of seam 1 in 17
3. Geological reserve 23.72 Mt
4. Mineable reserve 20.07Mt
5. RMR of roof 57.64 (cat. -3)
6. Degree of gassiness First degree
7. Depth of seam from surface 15 to 180 m
8. Incubation period 9 months
9. Annual production 680000 Te

4. Approach and method of working
Method used :- NAVID ANGLE METHOD.
Extraction of pillar by caving using continuous miner and shuttle car
combination in panel no. KCMS-6a with avg. production of 1300Te/day.
Mode of mine entries
SEAM ENTRY DIMENSION LENGTH GRADIENT USE
Inclined 1 4.8m * 2.4m 95m 1 in 5 Belt roadways and
intake airway
C Inclined 2 4.8m * 2.4m 67m 1 in 4 Material transport
roadway and intake
airway
Air Shaft 5.0m*21.52m Return airway

5. The equipments used were
EQUIPMENTS MFG. COUNTRY NO. OF EQUIMENT
Continuous Miner JOY 12CM 15 USA 1
Shuttle Car JOY 10 SC 32 USA 2
FEEDER BREAKER BF 14B 3C USA 1
CRAM Quadbolter Four Mast AUSTRALIA 1
Eimco Elcon Model 811 LHD UK 1
Mine line 1140V Load Centre INDIA 1

6. CONTINUOUS MINER
KOMATSU JOY 12CM 15 Date of commissioned
15 March 2008

7. INTRODUCTION
 A continuous miner is a mining machine that produces a constant
flow of ore from the working face of the mine.
 It has been used in the production line to meet the high productivity
requirements.
 The machine continuously extracts coal as it is loading coal with a
cutting steel drum and conveyor system.
 Continuous miners are driverless machine controlled via remote
control.
 Used in Underground Mining.

8. Main Parts of Continuous Miner
Cutter Drum
Cutting picks
Gathering Arms
Chain Conveyor
Hydraulic Cylinders
Boom
Traction

9. Applicability
• Coal - Moderate hard to soft
• Seam thickness - 1.8m to 5m
• Floor condition - Hard competent floor
• Gradient - 1 in 8
• Roof condition - Competent roof with roof support
• Production rate - High

10. Specification
Model - JOY12CM15
Chassis height - 2032mm
Chassis width - 2950mm
Overall length - 11020mm
Maximum Cutting Height - 4600mm
Minimum Cutting Height - 2285mm
Cutting Diameter - 1120mm
Cutting Width - 3300mm
Drum speed – 50rpm
Bit Tip speed – 2.92m/s
Machine Weight - 57 Tonne
Ground pressure - 32 psi

11. Specification
Gathering head type - CLA (Dual Drive)
Gathering arm speed - 54 rpm
Gathering head loading rate - Up to 30 tonne/min
Conveyor Width - 760mm
Conveyor chain speed - 2.44m/s
MOTORS
• Cutting - 2@170kW
• Pump - 1@52kW
• Gathering Head - 2@40kW
• Traction - 2@26kW
• Input volt. - 950 V@ 50Hz

12. Cutter Drum

13. Cutter Drum
• Continuous Miner consists of a large cutting drum.
• Drum is made up of steel.
• It has 66 tungsten carbide picks.
• The material strength of drum should be enough to scrap coal from
the seam.
• The majority of the continuous miners currently in operation are of
horizontal drum type on which peaks are used.

14. CUTTER PICKS
The cutting portion of the pick consists of two materials, tungsten carbide and
cobalt, sintered together to form a matrix of carbide grains within a cement of
fused carbon.

15. CUTTER PICKS
The most important physical properties of the cemented carbide are hardness
and toughness.
The value of both these properties can be varied by the presence of cobalt.
Tungsten carbide (WC)
Hardness:-
2600(Vickers)
80 (Rockwell)

16. CUTTER PICKS
Picks will be replaced when wear out which is mounted on a large
rotating steel drum.

17. CUTTER PICKS
• Tungsten Carbide picks are used for cutting.
• Replaced when wear out and treated as consumables.
• There is fine water spray of 12 bar pressure behind cutting drum for dust control.

18. Conclusion
• Continuous Miner has increased the production rate in mines.
• As now-a-days companies have focused more on production. So,
continuous miner is fulfilling their requirements.
• It has reduced the man power and accidental records as compared to
conventional methods.