JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Overview

Courses Objective: This course is at detailed explanation of the underground coal mining methods including opening of deposits, development into pillars, depillaring, longwall mining and other special methods of thick seam mining such as blasting gallery method, hydraulic mining etc.

Course Outcomes

Present share of about 20% production of coal in India from underground

mining is expected to increase in near future, due to depletion of reserves amenable for opencast mining. Therefore, this course is highly useful for the future mining engineers to take challenge of producing coal very difficult geomining conditions at deeper horizons with special emphasis on the latest experimental trails conducted in Indian coalfield

UNIT - I

Introduction to Mine Planning; Size of mining property, reserves and production capacity. Opening of Deposits; Developments of mine for in-seam mining and horizon mining (including shaft pillar and their comparison, advantages and disadvantages), division into levels and districts.

UNIT - II

Development; General principle of Bord & Pillar Development, their choice, suitability, advantages and disadvantages, layout of Bord & Pillar panel, size of panel, statutory provisions, manual and mechanized system of development: conditions suitable for application of mechanized loader and continuous miners; factor affecting the selection of equipment.

UNIT - III

Pillar Extraction: preparatory arrangement for depillaring operation, statutory provision for depillaring, principle and designing of pillar extraction, size of a district. factors, affecting choice of pillar extraction, depillaring with caving, stowing, mechanized depillaring operation, organization and safety. Layout for required outputs, types of machines, personnel and working of thick seams and blasting gallery method.

UNIT - IV

Longwall mining: Longwall methods of working, their choice, suitability, advantages and disadvantages. Layout of the workings for the required output, length and orientation of long wall faces, Shape & size of development roadways and gate roads and their maintenance. Mechanized longwall face organization.

B.TECH. MINING ENGG.

UNIT - V

Mechanized extraction of longwall panel with shearer and plough trepanner; support systems of longwall face and gate roads. Methods for minning steeply inclined seams and thick seams, hydraulic mining, underground mass production technologies

TEXT BOOKS

• 1. R.D. Singh – Principles and Practices of Modern Coal Mining, New Age International Publication.
• 2. Singh, T.N. Singh – Underground Mining of Coal Oxford Publication.

REFERENCE BOOKS

• 1. Peng S.S., Chiang H.S. – Longwall mining, John Willey Publication.
• 2. Mathur S.P. – Mine Planning for Coal, M.J Consultant Publication. B.TECH. MINING ENGG.