Quadbolter

QUADBOLTERSubmitted by: Abhik Chatterjee & Harshit Mishra

June, 2011.

The JOY Quadbolter is a track-mounted roofbolter fitted with two highly manoeuvrable boom assemblies. On the end of each boom is an operator platform fitted with two HFX roofbolter units. The quadbolter also incorporates an inbuilt temporary roof support.

Introduction

The quadbolter is available in either wet or dry drill models and capable of operating in heights from 7.5 to 14.7 feet (2.3 to 4.5 meters).

Specifications : -

The machines operational area can be divided into three distinct zones :Prohibited ZonesRestricted ZonesWalkway Zones

Access Zones

SPECIFICATION OF Q/BSUPPLY VOLTAGE 1100VAC 50 HZ 3 PHASE

WATER CONS/2 BOLTER 40-50 L/MIN

WATER PRESSURE 100-175 PSI

BOLTING RATE UPTO 25 BOLTS/HOUR

MINI HT WITH TRS N 2150 MM

MINI HT O 2000MM

MINI OPERATING HT R 2400MM

MAXI BOLTING HT MAL 5375MM

MINI OPERATING WIDTH 3160MM

LENGTH OVERALL 7790MM

GROUND CLEARANCE 295MM

GROSS WT 29800 KG

ELEC MOTOR 112KW

Hydraulic SystemTraction SystemBolting SystemWater SystemElectric Supply

The different systems of the machine:

Major Areas

Operator Controls :

Main Controller Status indicator Pannel Status Pannel - Circuit Breaker LEDs Status Pannel - Earth Leakage Trip LEDs Status Pannel - Warning LED Status Pannel - Trip LEDs Meters Operator Switches

Operator Controls

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HDR Rotation UnitFeed Frame Slide RodsRotation Unit Slide RodsICM2 Timberjack RodsTop plate Centralising JawsFeed CylinderTimberjack Rod Transfer TubesFeed Chains

Mechanical System

HDR

HDR Rotation Unit

SHEAR PIN BREAKOUT NUTSSHEAR PIN BREAKOUT NUTS

BOLT & END ASSEMBLY

Improve Roof Support< 25mm Thread Showing

Incorrect installation

Breakout faulty

Resin OK

Hole too long

Feed Frame Slide Rod

Idler

TractionTrack Chain

Metal Face SealsTraction Drive MotorTake-up UnitTrack Chain AdjustmentTraction Drive AssemblyReducer GearboxDrive Sprocket Assembly

Traction Components

Drive Sprocket Assembly

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Traction Reducer Gearbox

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Chassis Temporary Roof Support Operator’s Canopy Outer Bolter Inner Bolter Upper Boom Lower Boom Cable Reel Drive Assembly Power Pack (Hydraulic Filter, Pump, Drive,

Motor)

Temporary Roof Support

Feed Chain

Hydraulic System

Load Centre

Hydraulic System DetailsElectric Pannel

Pump Motor

Reduction

Gearbox

Hydraulic

PumpFilter

Unloader cum Divergi

ng Valve

Components of Hydraulic System PVG Control Valve Counterbalance Valve Roof Bolter automatic Water Valve Roof Bolter ICM2 Control System Roof Bolter Load Sense Relief Valve Roof Bolter Tilt Cylinder Roof Bolter Gripper Jaw Cylinders Cable Reel TRS Arm Cylinder TRS Column & Wings Powerpack

Air CooledPower Rating – 112kWAmbient Temperature – 40˚CVoltage – 1100VCurrent – 71AmpTemperature Rise – 80KPhase – 3ØWeight – 1TonePeriod – 6500Hours

Pump Motor Specification

ControllerBreaker CircuitPilot ControlEarth LeakageMethane CircuitLightsPower SuppliesPump Circuit

Electrical System

The machine is controlled by programmable sensor controller (PSC). The PSC provides both input and output controls for the machine.

Controller

The main isolator is a circuit breaker that controls all power to the machine from the load side to the circuit breaker. The main isolator can be operated in three ways:1. Manually.2. Magnetically.3. Shunt trip.

Breaker Circuit

The pilot control circuit allows supply to the machine to be energized from the machine. The pilot circuit comprises of :1. Cable run out switch2. Main circuit breaker interlock3. M/C door interloack4. Pump motor micro therm5. Emergency stop switches6. Remote start switch7. 30 ohm resistor8. End of the line diode

Pilot Control

The earth leakage circuitry for the secondary of the control transformer, consists of two major components, earth leakage toroids and earth leakage relays. Toroids moniter the current in the conductors. The earth leakage relays latch when the toroid detects an imbalance in the current flow.

Earth Leakage

Methane is monitered by one general body methane gas detector located on the drilling platform. The detector is situated to detect the methane levels in the general body atmosphere.

Methane Circuit

The machine is fitted with two machine lights at each end of the machine. Each light consists of a white and red light. The machine lights are controlled from the machine light switch located on the main enclosure. The switch allows the lights to be operated in auto, off or all on positions.

Lights