Longwall machinery and equipment with a detailed case study of the equipment used at Jhanjra Longwall in India. By Pratyush Ranjan Nath B.Tech Mining NIT Rourkela

1. PRESENTED BY – PRATYUSH RANJAN NATH
4TH SEMESTER [ 119MN0951 ]
Longwall Mining
Equipment
N AT I O N A L I N S T I T U T E O f T E C H N O LO G Y,
R O U R K E L A
UNDER GUIDANCE OF – PROF. SINGAM JAYANTHU

2. U C M M
L o n g w a l l
REFERENCES :
 Longwall Mining Equipment Manual by Caterpillar [ CAT Industries ]
 Presentation by V.N.S. Prasad M on Indian Longwall Mining at 3rd Asian Mining
Congress, Kolkata
 JHANJRA Project Colliery : A Prodigy by Mr. Prabir Kumar Mandal ( Sr. Manager/
Colliery manager, Jhanjra project Colliery )
 International Research Journal of Engineering and Technology ( www.irjet.com )
 Eastern Coal Ltd. Official website ( www.easterncoal.gov.in )
 Wikipedia ( https://en.wikipedia.org/wiki/Jhanjra )
 www.coaleducation.org
 www.undergroundcoal.com
2

3. U C M M
L o n g w a l l
3
LONGW
ALL
EQUIPM
ENTS
ROOF
SUPPO
RT SHEARE
R
AUTOM
ATED
PLOW
AFC
SYSTE
MS
CONTR
OLL
PANEL
ROOF
SUPPO
RT
CARRIE
RS
CONTIN
OUS
MINERS
BELT
SYSTE
M AND
ROLLS

4. U C M M
L o n g w a l l
ROOF
SUPPORT
Highly efficient hydraulic
supports
Maximizing controls with
its customized design
Height range : 1.8 –
24.6 ft.
Roof supports up to 2
meters
Shield density up to 12.5
ton/ft2
4
BACKBONEOF LONGWALL
@Jalladlebanon.com

5. U C M M
L o n g w a l l
SHEARE
R
5
Can cut and load up to 5500 tons
per hour
Can weigh from 75 tons to 120
ton
Has a speed range of 10–30
meters/minute
Maintenance available for every
single unit separately
Vibration Monitoring through new
intelligent sensors
SURVIVALOFTHE FITTEST
@cat.com

6. U C M M
L o n g w a l l
SYSTEMS
6
AUTOMATED FACE CONVEYOR
Successfully operated up to
350-470 meter length
Can be operated with a
speed up to 1.6 m/s
Invented in 1940s
Now producing up to 5512
tons per hour
@idealmakina.ltd
@news.cision.com

7. U C M M
L o n g w a l l
SYSTEMS
7
THE COAL CUTTER
Made especially for coal
seams
Its operates at a
relatively faster speed.
Compared to shearers, plows are
Cheap, Simple and makes relatively
lower amount of dust
keeps exposed roof area very small [but a
large number of chock movements would be
required to maintain this]
@cat.com
@worldcoal.com

8. U C M M
L o n g w a l l
LONGWALL
AUTOMATION
8
UNPARALLED CONTROLL
Full range – Full Automation
Advanced Networking and
Visualization
Optimizing the use of equipment
to maximize production
Minimizes the exposer of
miners to unsafe and dust
laden areas
@cat.com

9. U C M M
L o n g w a l l
CARRIERS
9
PACKEDWITH POWER
Customizable according to
Layout, geology and loads to
be carried
Built to meet the present
and future requirements in
UG mines
The pack of power that
provides maximum lift
@cbmining.com
@petersoncat.com

10. U C M M
L o n g w a l l
MINERS
10
ROADWAY DEVELOPMENT
Fast and Efficient
Easily Movable without
dismantling the parts.
Ideal mines Roadway
Development equipment
under a limited height.
@burkinaequipments.com
@saymine.com

11. U C M M
L o n g w a l l
JHANJRA PROJECT COLLIERY
Jha njra Are a , Ea ste r n Coa lfie lds Ltd.
11
CASE STUDY ON LONGWALL MACHINARY OF
@youtube.com

12. U C M M
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 1985 – 1989: Coal Production started by conventional method and
Preparation of LW panel started.
 2016 – LW Panel (CODCO) with higher support capacity started operation in
MIC.
 Jhanjra has
 Powered Support Longwall Technology – 3 nos.
 Continuous Miner Technology (Bord/Room & Pillar) – 20 nos.
 Bolter Miner – 3 nos.
 Produces around 7% of Total Production of Eastern Coalfields Ltd.
 Produced 3.376 MTe of Coal which out of 9.06 Mte of Total UG Production of
Eastern Coalfields Ltd. in FY 18-19
12
ABOUT JHANJRA :

13. U C M M
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13
ABOUT JHANJRA :
Source- Official Website of ECL

14. U C M M
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14
WHAT LONGWALL EQUIPMENT ARE
BEING USED AT JHANJRA LONGWALL

15. U C M M
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ROOF
SUPPORT
15
BACKBONEOF LONGWALL
Support Type
2-legged shield
support
Height of support 2600-5600 mm
Support yield load
@43.8 Mpa
11000 KN

16. U C M M
L o n g w a l l
SHEARE
R
16
SURVIVALOFTHE FITTEST
Number of cuts per
day
7 to 8
Maximum
production in a day
9260 Tonnes
Production
capacity
2800 Tonne/hour
Diameter of
Shearer drum
2800 mm
Maximum cutting
height
5500 mm

17. U C M M
L o n g w a l l
SYSTEMS
17
ARMOURED FACE CONVEYOR Length 145m
Maximum
transport capacity
1800t/h
Chain speed 1.1m/s
Installed power 2x400kW
Chain dimensions 34×126 mm
Grade D Grade
Model of AFC : SGZ900/800

18. U C M M
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LOADER
18
Length 40m
Maximum
transport capacity
2000t/h
Rated voltag e 3300 V
Installed power 315kW
Chain dimensions 34×126 mm
Grade D Grade
Model of Bridge Stage Loader : SZZ 900/315
@Ugolmash.com

19. U C M M
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ROAD
HEADERS
19
Number of headers
used
2 nos.
Main gate
Dimensions
3.8m[height]X4.8
m
[width]
Tail gate
Dimensions
3.6m[height]X4.8
m
[width]
Maximum Cutting
Height
4.8 m
Maximum Cutting
Width
5.0 m
@basiccivilengineering.com
ROADWAY DEVELOPER

20. U C M M
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In
Mega
Tons
20
Production Figures of Jhanjra Project Colliery
1.42 1.48
2.44
3.17
3.38
3.52
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
1 2 3 4 5 6
2014-15 2015-16 2016-17 2017-18 2018-19 2019-20

21. U C M M
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21
CONCLUSION :
 With advent of rising demands in Global Coal and Indian Coal consuming
industries the rate of production has to be increased at a higher rate.
 Presently there are only 2 sets of Longwall operating in Coal India but the
number of Longwall packages operational has to be increased
 The history of Longwall is quite successful at Jhanjra mines compared to the
others in India.
 There is much that Indian coal industry can learn from Chinese experiences in
Long wall technology, especially for thick seam mining using sub-level caving.
 Coal industry must accept the challenge of transplanting the international
best practices into India with more effective face management on a
consistent basis.

22. Thank You
Praty us h Ra nja n N ath
4th Semester [119MN0951]
NIT Rourkela