JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Pre-Requisites

NIL

Course Objectives

This is the second paper in the mine mechanization course. In the previous paper

a few machinery working in the mining industry were introduced to the student. In this paper some more machines like winders in deep mines, opencast mine machinery and mine pumps are introduced.

Course Outcomes

After going through this course the student will have basic knowledge of

installation, commissioning, operation, maintenance and safety aspects of the mining machinery viz., different types of mine winders, man riding systems in underground mines, face machinery like SDL, LHD, Continuous miners, mine pumps and open cast mine machinery like Blast hole drills, shovels, dragline machine, BWE, dumpers etc.

UNIT - I

Mine Winders: Koepe and Drum winders and their applications, head gear and its design, head gear pulley, shaft fitting – Keps, rope guides, shaft sinking and bells, capping and recapping and its design, cage and suspension gear. Pit top and pit bottom lay outs. Pit top railway sidings.

UNIT - II

Winding Drum-types and construction, Safety devices in winders-over speed and over wind preventers, slow braking, depth indicator, Methods of counter balancing rope. Duty cycle. Mechanical and electrical braking. Winding from different levels in shaft. Numerical problems in different types of winding including Torque – time diagrams.

UNIT - III

Man riding system in underground mines. Face Machinery: SDL, LHD, Shuttle cars, underground trucks different types of mechanical loaders – their constructions, operation, applications, capacity and maintenance. Cutter loaders – Shearers, Coal plough and Continuous Miners – their constructional features, applications, capacity and maintenance; Hydraulic power pack. Maintenance of equipment including preventive maintenance and condition monitoring. Hydraulic layouts of longwall focus. Introduction to automation: construction and operation of coal drill and Iachhammer.

UNIT - IV

Power loader (Mechanical loader), Shuttle cars: their constructions, operation, applications, capacity and maintenance. Pumps: Sources of water in mines, design of sumps, types, Construction, operation, characteristics and application, Calculation of size, efficiencies and capacities. Layout of drainage system.

UNIT - V

Opencast Machinery: Blast Hole Drill, Ripper, front and loaders, dozers, road grades, Shovel, rock breakers, water tankers, Dragline, Dumper, including machinery and tracker –etc., Bucket Wheel Excavator, Continuous Miners drayars – their basic construction, applications and operation. Mine Electrical Engineering: Distribution of electrical power in mines, types of mine cables and their fields of application, flame proof and intrincially safe equipment/circuits, signaling and telecommunication in mines including fiber optic cables and walking talkies and mining switch years. Electrical layout of longwall focus.

TEXT BOOKS:

• 1. Deshmukh D.J., Vol. I & II Elements of Mining Technology R18 B.TECH MINING ENGG. III YEAR
• 2. Cherkasky B.M., Pumps & Compressors
• 3. Walkar winding & Transport

REFERENCE BOOKS:

• 1. Alemgren, G. Kumar – Mine Mechanisation and Automation.
• 2. Mason – Coal Mining Series. R18 B.TECH MINING ENGG. III YEAR