JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Pre-requisites

Under graduate Physics and Maths

Course Objectives

Upon completion of the course, students shall be able to know the

concepts of mine ventilation, different mine gases, thermal environment and psychometry, planning and design of ventilation systems for underground coal and metal mines

Course outcomes: Helps the students to understand details of mine gases, and sources of heat load sources in mines, apply the mechanical ventilation equipment including main fan, booster/auxiliary fans and study of ventilation layouts for underground coal and metal mining.

UNIT - I

Composition of mine air, Mine gases: properties, origin, occurrence, physiological effects, detection, monitoring and control, Methane layering, Degasification of coal seams. Production, assessment, physiological effects and control of mine dusts;

UNIT - II

Thermal environment and psychrometry: Sources of heat load sources in mines, Effect of heat and humidity on miners. Psychrometry, Cooling power of mine air, Methods of improving of cooling power of mine air, Air Conditioning - basic vapor cycle;

UNIT - III

Mechanics of air flow through mine openings, Resistance of airways, Equivalent orifice, distribution of air current, control devices in ventilation systems, Natural ventilation: Calculation of NVP, Thermodynamic aspects, Artificial aids to natural ventilation;

UNIT - IV

Mechanical ventilation: Principal types of mine fans, Installation, operation, characteristics and selection of mine fans, Fan testing and Output Control, Fan laws and fan drives, Evasees, Diffusers, Booster fans, Auxiliary ventilation. Reversal of air currents and controlled recirculation; Ventilation Survey: Quantity and Pressure survey;

UNIT - V

Planning and Design of Ventilation Systems: mine ventilation design criteria and ventilation design factors, ventilation standards, Ascensional, descensional, homotropal, antitropal, central and boundary ventilation systems, Ventilation layouts for coal and metal mining, Network analysis : Hardy-Cross method, Computer application in mine ventilation.

TEXT BOOKS:

• 1. M. J. McPherson, Subsurface Ventilation and Environmental Engineering, Chapman & Hall, 1993
• 2. G. B. Mishra, Mine Environment and Ventilation, Oxford University Press, Fifth Impression, 1993 B.TECH. MINING ENGG.

REFERENCE BOOKS:

• 1. H. L. Hartman, J. M. Mutmansky, R. V. Ramani and Y. J. Wang, Mine Ventilation And Air Conditioning , Wiley-interscience, 3rd Edition, 1997
• 2. S. P. Banerjee, Mine Ventilation, Lovely Prakashan, 1st Edition, 2003 B.TECH. MINING ENGG.