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1. M.B.M. ENGINEERING COLLEGE,JODHPUR
DEPARTMENT OF MINING ENGINEERING
LONG WALL MINING
METHOD
PRESENTED BY- PRAKASH SUTHAR
TEAMMATES- PRADEEP SINGH RATHORE
PRAKASH VISHNOI
PRIYANSHU
RAMSWAROOP

2.  CONTENTS FOR LONGWALL
 INTRODUCTION
 EQUIPMENT
 MACHINERY USE IN LONG WALL
 ADVANTAGE
 DISADVANTAGE
 REASON FOR SLOW PROGRESS OF LONGWALL IN INDIA
 PRESENT ACTION AND FUTURE NEEDS
 CONCLUSIONS

3.  INTRODUCTION
 This is a form of underground coal mining where a longwall of coal is mined in
a single slice (Typically 0.6m -1.0m thick).
 Longwall panel is typically 3-4 km long and 250-400m wide.
 As a cut or slice is taken along the length of the wall.

4.  EQUIPMENTS
o Powered support system
o Shearer
o Armoured face conveyor
o Conveyor system
o Electricals & communications

5.  MACHINERY USE IN LONG WALL
MINING

6. Fig: Working system of long wall mining method

7.  ADVANTAGE OF LONG WALL MINING
o High recovery
o Lower operating cost
o Easier to supervise
o Increased safety
o Higher quantity of coal
o Suitable for thick seam
o Simple ventilation
o Better for deep seated mines

8.  DISADVANTAGE OF LONGWALL MINING
o Small problem = Big production losses.
o Dust control difficult.
o Overloading conveyor system.

9.  REASON FOR SLOW PROGRESS OF
LONGWALL IN INDIA.
o Long wall had to co-exist with the conventional mining in most
of the mines ,which caused management problem.
o Coal companies were sensitive to the failure of a few long wall
faces and were prepared to risk huge investments.
o Geological and geotechnical condition were more difficult then
expected.
o Problems in the maintenance of the equipment.
o Equipment sourced from many suppliers with no accountability.

10.  PERSENT ACTION AND FUTURE
NEEDS.
o Spare parts of management.
o Workshops and overhauling facilities.
o Manpower development.
o Indigenisation.
o Monitoring of performance.

11.  CONCLUSIONS.
o Mechanised longwall mining has emerged as the most
successful production technology in the global coal mining
scenario.
o Introduction of fully mechanised longwall technology was
made in China and India almost simultaneously.

12.  REFERENCE
1. www.miningmes.com
2. mine portal.com
3. mining method Wikipedia
4. google images

13. Thank you!!!!!