Mine Safety and Health Administration (MSHA) - Interactive Training - JTA Spiders

Longwall Move (Tear Down) Spider No.2

1. 8: Roof Bolting with the Pan Line Bolter

Make Exam

Follow Roof Control Plan

Make gas exam

Gas test required every 20 minutes

Raise canopy

Anyone assigned to run this bolter must be task trained

Lower stab jack

Check roof and rib

Obtain starter steel with bit

1 1/2"

Place starter steel in chuck

Raise bit to roof

Slowly start steel rotation

Drill hole 2' deep

Lower steel

Stop rotation

Remove start steel

Replace with finishing steel

1 3/8' bit

Raise bit into hole

Start rotation

Finish drilling hole to 6'

Lower and stop rotation

Remove steel

Assemble pin, plate and T-board

Insert resin cartridge into the hole

Insert assembled pin into hole

Insert wrench into drill chuck

Raise to the top and rotate bolt

Check torque according to Roof Control Plan

Lower the boom

Raise stab jack

Lower canopy

Swing boom and rotate to next face bolt

Repeat bolting sequence

Remove temporary jack

Move temporary jack forward 5' and reinstall

Get in the seat of the bolter

Tram bolter up 5'

Dead man has to be activated for tramming bolter

Repeat bolting sequence

2. 9: Remove Face Chain

Conduct Exam

Everyone on the longwall must be aware of chain removing activities. When pulling the top chain, you need positive communication with anyone working on the pan line

Follow cutting and welding plan

Chain must be cut at tail gate before you can pull

Cut face chain

Make continuous gas tests

Wet area down

Rock dust 10'in all directions

Cut chain on connection link

Shut torches down

Cut power cables at the junction box of the #1 and #2 motor

Hook mule to chain

Notify anyone working on the pan line that chain pulling is about to start

Everyone on the longwall must be aware of chain removing activities. When pulling the top chain, you need positive communication with anyone working on the pan line

Obtain and examine necessary tools

Torches

Gas detectors

Rock dust

Burning goggles

Welding gloves

Striker

Water hose

Allen wrench

Socket set

Hammer

Assorted wrenches

Chain boxes

Mule

Scoop

Pull chain 250' to connector

May take several pulls

Remove #1 and #2 motor cables from the 8-bay box, lock and tag

Follow lock-out/tag out procedures

Remove 6 Allen head bolts and remove access door

Hook door to mule or scoop with #8 chain

Only Grade 8 chain 3/8"or better should be used

Pull door out of work area

Caution: Keep people clear while pulling with chain

Repeat process until all chain is removed

3. 10: Remove pan line in sets of two

Conduct Exam

Obtain and examine the following tools

Use lady slipper bar

Hammer

3/8" punch

Chisel

Shovel

Gloves

Safety glasses

Channel locks

Screw driver

Prepare pan line for removal

Clean dog bone socket

Take out keepers

Remove dog bone on both sides

Place dog bone in pan line

Pull accu-trac pin on headgate side where pan is being separated

Pull keeper pin

Push accu-trac pin out toward shield

Lift accu-trac, replace pin and keeper

Remove horizontal pin for the pan clevis

Remove keeper

Slide pin out

Pull relay bar back

Reinstall pin and keeper in clevis

Open two cable tray doors

Drop cable to the bottom

Move pinner cable to toe of shield

Pan line removal

Notify scoop operator that first set of pans are ready

Communicate with scoop operator and other employees in area

Caution: Notify all personnel in the area of the danger of pan line removal. Use start up signals before starting scoop and moving

Scoop will take two pans each time

Repeat process every two pans until all pans are removed

4. 11: Remove Headgate Drive

Conduct Exam

Obtain and examine the following tools

Use lady slipper bar

Hammer

3/8" punch

Chisel

Shovel

Torches

Striker

Water hose

Fire Extinguisher

Rock dust

Methane detector

Goggles

Welding gloves

3/4" socket set

2 rock bars