28
TAUHID MOHAMMAD ROLL NO:- 15MT000557 DEPARTMENT OF MINING MACHINERY ENGINEERING INDIAN SCHOOL OF MINES DHANBAD CONTINUOUS MINERS

CONTINUOUS MINERS

Embed Size (px)

Citation preview

Page 1: CONTINUOUS MINERS

TAUHID MOHAMMAD

ROLL NO:- 15MT000557

DEPARTMENT OF MINING MACHINERY ENGINEERING INDIAN SCHOOL OF MINES DHANBAD

CONTINUOUS MINERS

Page 2: CONTINUOUS MINERS

INTRODUCTION

CONTINUOUS MINER:-This machine is used for scraping and loading of coal from the seam used in

underground Board and Pillar mining operation

Page 3: CONTINUOUS MINERS

Main parts of continuous Miner:-

• Cutter• Gathering head• Conveyor• Traction• Dust collector• Manifold hydraulics• Electrical circuits

Page 4: CONTINUOUS MINERS

MAIN PARTS OF CONTINUOUS MINER

Page 5: CONTINUOUS MINERS

Cutter drum :-

• The cutter head may be of borer type, oscillating head type and horizontal drum type

• The majority of the continuous miner currently in operation are of horizontal drum type on which block are mounted in the form of a scrolls , carrying peaks boxes.

• The boxes are welded or bolted to the drum.

Page 6: CONTINUOUS MINERS

Cutter motor

There are 2 cutter motor one in each side of the machine AC induction 1500 rpm and 170 KW each

Page 7: CONTINUOUS MINERS

Cutter motor

• This motor drives the cutter head drums on a Continuous Miner.

• The motor is constructed as follows:• - All steel frame

- Heavy duty end-brackets for double flange mounting- Water cooling by means of wrap around water- jacket- Cable entry by flameproof gland or socket connector- Flameproof

Page 8: CONTINUOUS MINERS

PEAK (TEETH )

Peaks consists of tungsten carbide and cobalt material , these peaks an be replaced when broken which is mounted on a large rotating steel drum.

Page 9: CONTINUOUS MINERS

ANGLE OF ATTACK & CLEARANCE ANGLE OF A PEAK

• Angle formed by line drawn longitudinally through the shank and the point of peak and the line forming the radius of the peak point .

• The sum of the back and front clearance angles will be equal to 30 degree.

Page 10: CONTINUOUS MINERS

Gathering motor:-• This motor has been designed

to drive the gathering arms on the spade of a Continuous Miner through a reduction gearbox.

• The motor is constructed as follows:-

# All steel frame# Heavy duty end-brackets for double flange mounting# Water cooling by means of wrap around water-jacket# Cable entry by flameproof gland or socket connector#Flameproof

Supply Voltage:

Standard Voltages up to 1100 V

Page 11: CONTINUOUS MINERS

CLA:-CENTRIFUGAL LOADING ARM

Gathering Head consists of two Gathering head motorswhich runs the CLA’s And which are responsible for loading of coal to the conveyor.

Page 12: CONTINUOUS MINERS

FLOODED BED SCRUBBER

Page 13: CONTINUOUS MINERS

Dust collector

• This uses a slurry pump motor to remove slurry from dust collector sump it is located in the dust collector fan compartment .

Page 14: CONTINUOUS MINERS

The conveyor chain:- The conveyor chain has an automatic hydraulic chain tensioner to ensure correct chain tension. Incorrect tensioning is the main cause of premature chain failure. Large-diameter pins and bushings lower contact pressure in the bushings

VENTILATION:- Health and safety features include ventilation, dust collector, scrubber, discharge to left or right, dust ignition protection, water solenoid valve to minimize water use and spillage, methane monitoring, noise reduction, and remote control.

Page 15: CONTINUOUS MINERS

CHAIN CONVEYOR:-

• The conveyor having conveyor chain is responsible for the movement of coal from foot shaft to the end of conveyor which dumps into the shuttle car.

• Conveyor chain adjustment:-• If the movement of flight bar is >100mm from

center then the chain should be tightened• If the movement of flight bar <50mm from

center then the chain should be loosened.

Page 16: CONTINUOUS MINERS

Conveyor Chain Adjustment :-

• A loose chain may jam , a tight chain may become overloaded causing high temperature in drive or foot shaft leading to excessive wear so in order to addresses this issue a tension adjustment arrangement is made by incorporating a spring at the end to take up cylinder to the side of swing conveyor.

Page 17: CONTINUOUS MINERS

TRACTION :-

• It is equipped with spring applied ,hydraulically released traction brakes which are normally applied.

• Springs inside the brake assembly push a piston against brake disks results in stoppage

• These are released when hydraulic pressure is applied to compress the springs and retract the piston

Page 18: CONTINUOUS MINERS

Taction :- • Incorporates crawler chain , brakes ,traction

motor ,traction planetary and traction reducer. • Traction motor are of 26KW of DC• Traction motors are connected with reducer

and sun and planetary arrangement helps the crawler chain to move which sits on the sprocket connected with sun shaft.

Page 19: CONTINUOUS MINERS
Page 20: CONTINUOUS MINERS

TYPES OF CONTINUOUS MINER

• The continuous miner product range is segmented by the mining height requirement into three machine classes for low ,medium and high seam application.

• 14CM Series Continuous Miners• 12CM Series Continuous Miners• 12HM Series Continuous Miners

Page 21: CONTINUOUS MINERS

14CM Series 14CM provides the ideal combination of

cutting power, proven components and reliability for lower to mid-seam applications in a variety of materials. Built to withstand the most rigorous conditions, the 14CM offers optimum service life and return on investment.

Page 22: CONTINUOUS MINERS

12CM SeriesMid to high-seam applications is the 12CM series continuous miners. This model line, available for both 950 and 2300 volt operation, can operate in seam heights up to 16 feet 4 inches or 5.0 meters

The 12CM with remote control and flooded bed dust collector options provide deep cut capability. Deeper cuts mean fewer place changes, which in turn means increased production.

Deep Cut Capability

Page 23: CONTINUOUS MINERS

12HM SeriesHard rock mining applications is the 12HM series continuous miners. These machines are successfully operating in trona, gypsum, potash and salt mines around the world.

High Capacity Conveying System

The conveying system on the 12HM features a 38 inch (965 mm) conveyor for increased production capability. In addition to the dual drive gathering head system for loading, the 12HM is also equipped with single rear conveyor chain drive or optional dual rear conveyor chain drive. The cam style take-up automatically provides proper conveyor chain adjustment as the conveyor swings.

Page 24: CONTINUOUS MINERS

SPECIFICATION:-

• JOY 12CM is a high capacity ,totally remote controlled CM designed for medium to high coal seam application.

The machine has :-• Cutter head drum diameter 1.12m• Cutting width 3.3m• Max cutting height 4.6m• Conveyor width 0.76m with 2.41m/s• CM is equipped with 2 cutter motors, with standard clutch protected ,AC

induction motor 170KW mounted parallel to centerline of boom frame.• CM can remove 24tons of minerals per minute .

Page 25: CONTINUOUS MINERS

• Each cutter motor connects to gearing of gear case using an internal torque shafts.

• 2 Gathering head motors (AC) of 40KW• 2 TRACTION (DC) of 26 KW • 1 Pump motor of 52KW• 1 Dust collector fan motor 19KW• Total weight of CM is 58 tonns i.e58,376kg

Page 26: CONTINUOUS MINERS

Manufacturing Companies of Continuous Miner

• Sandvik mining (Amsterdam Netherlands)• Joy global • DynaMisk group pty Ltd• RTM Equipment Ltd • Atlas mine and mill supply • CMS underground construction• A & A import • Caterpillar

Page 27: CONTINUOUS MINERS

REFERENCES :-

• WINKIPEDIA • GOOGLE SEARCH• GOOGLE IMAGES

Page 28: CONTINUOUS MINERS

THANK YOU