JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives:

• 1. To study the development of panels and extraction of coal in Bord and Pillar method.
• 2. To study the Longwall 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 the following:

• 1. Development and depillaring of coal by Bord and Pillar.
• 2. Longwall mining by advancing and retreating methods.
• 3. Extraction of thick seams by slice mining.
• 4. Methods of winning of coal seams which are liable to spontaneous leaching and coal lumps.
• 5. Extraction of coal seams by blasting gallery methods, underground coal gasification and horizon mining.

UNIT - I

Introduction: Status of coal industry and deposit, estimation and classification coal reserves, Mode of entry by incline, shaft and adit; their application, advantages and disadvantages, 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, development of panel with semi mechanized equipment like LHD, SDL, Gathering Arm Loader with shuttle car and continuous miner.

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: Longwall advancing and retreating methods, development of panel, extraction of coal longwall mining with different machines-plough and shearer, design of longwall workings-optimum length of face, size of panel, gates, support system, personnel, organisation and safety measures, salvaging and relocations of equipment.

UNIT - V

Special Methods of Working: Problems of working thick & thin seams, Sublevel caving, Horizon mining, blasting gall ery method, worki ng of contiguous seams, working steeply inclined seams, working under surface structures and seams liable to spontaneous heating, outburst and bumps, etc. Hydraulic mining, Wongawalli mining method, shortwall, underground coal gasification, coal bed methane, shield mining; Thick seam mining methods- slice mining methods- Inclined slice mining with mechanized longwall mining.

TEXT BOOKS:

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

REFERENCE BOOKS:

• 1. Underground Winning of Coal – Singh, T.N. Singh, Oxford & IBH Publishing Co. Ltd.,1992.
• 2. Coal Mining in India, Mathur, S.P., M.S. Enterprises, Bilaspur, 1999.
• 3. Modern Coal Mining Technology Das S.K., Lovely Prakashan, Dhanbad 1994.
• 4. Thick Seam Mining, Problems and Issues, Singh T.N., Dhar, B.B. Oxford & IBH Publishers, 1992.
• 5. Mining Planning for Coal., Mathur, S.P., M.G. Consultants, Bilaspur, 1993.
• 6. Underground Mining Methods and Technology, Szwilski and Richards M.J., 1987.
• 7. Internet: www.miningindia.com.