JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Pre-Requisites

NIL

Course Objectives:

• 1. To study the development of panels and extraction of coal in Bord and Pillar method
• 2. To study the Long wall advancing and retreating methods
• 3. To study the various special methods of winning coal
• 4. To study and update of the mine criteria as per various legislation of India.
• 5. To know the various statutory aspects like CMR, MMR and the relevant DGMS circulars related to this course.

Course Outcomes

The students will gain knowledge on development and depillaring of coal by Bord

and Pillar and advancing and retreating in Longwall methods. They will also know about methods of winning of coal seams which have special features.

UNIT - I

INTRODUCTION: Status of coal industry and deposit, factors affecting choice of mining methods, classification of mining methods, grading and analysis of coal.

UNIT - II

BORD AND PILLAR METHOD-DEVELOPMENT: Design and development of a district / panel, sizes and shapes of galleries and pillars, bord and pillar, room and pillar methods, with conventional and continuous mining techniques with various equipment.

UNIT - III

BORD AND PILLAR METHOD – EXTRACTION: Pillar extraction by caving and stowing methods; mechanised extraction of pillars, shaft pillar extraction, systematic supports, surface, underground and face arrangements for stowing. Partial extraction.

UNIT - IV

LONGWALL METHOD: Advance and retreat methods, continuous and cyclic systems, extraction with different machines-ploughs, shearers, design of longwall workings, optimum length of face, size of panel, gates, support system, personnel, organisation and safety measures, salvaging and relocations of equipment, Punch longwall.

UNIT - V

SPECIAL METHODS OF WORKING: Problems of working thick & thin seams, multi slices, sublevel caving, horizon mining, gallery blasting method, contiguous seam working, working steeply inclined seams, working under surface structures and seams liable to spontaneous heating, outburst and bumps, etc. hydraulic mining, Wongawalli, shortwall, highwall mining, underground coal gasification, coal bed methane, shield mining.

TEXT BOOKS:

• 1. Singh, R.D. Principles and Practices of Modern Coal Mining, New Age International (P) Ltd., Chennai, 1994.
• 2. Peng S.S., and Chiang, H.S., Longwall Mining, John Willey and Sons, New York, 1992. R18 B.TECH MINING ENGG. III YEAR

REFERENCES

• 1. Singh, T.N. Singh, Underground Winning of Coal – Oxford & IBH Publishing Co. Ltd., 1992.
• 2. Mathur, S.P., Coal Mining in India, M.S. Enterprises, Bilaspur, 1999.
• 3. Mathur, S.P., Mining Planning for Coal., M.G. Consultants, Bilaspur, 1993.
• 4. Szwilski and Richards M.J., Underground Mining Methods and Technology, 1987.
• 5. Internet: www.miningindia.com R18 B.TECH MINING ENGG. III YEAR