MSHA - Interactive Training - JTA Spiders - Table of Contents

	Home \| Table of Contents \| Overview Map \| Icon Legend
	Longwall Move - (Tear Down) Spider No.1
	Contact: Palmer.Melvin@dol.gov

1. 1: Start-of-Shift Activities

Conduct visual examination

Hearing protection

Steel toe shoes

Obtain gas detector

Conduct visual examination

Check calibration

Check in/Tag in

Put on safety glasses

Enter the mine by elevator

Ensure mantrip has been pre-op'd (follow JSA)

Travel to main track

Check signal lights

Follow mine plan

2. 2: Enter Mine

Conduct travelway examination - Self Preformed Safety Assessment

Observe for mobile equipment

Maintain 300' clearance between trips

Check roof conditions

Check for cracks, loose rock, taking on weight, water

Check for loose ribs

Check for overhang

Check for ledges

Check for sloughing

Look for uneven bottom

Rough spots and bumps in the road

Soft spots/low spots

Look for track damage

Bent or broken rails

Loose fish plates

Observe the high voltage cable

Look for damage

Look for downed high voltage cable

Look for guarding and shielding

Look for clearance

Look for roadway debris

Look for crib blocks, rock, banding material, cable, bolts and knocked out timbers

Check for damaged bolts

Correct and/or report any unsafe conditions

Maintain a 3-point contact

Observe walkway

Look for slip hazards

Look for trip hazards

Look for fall hazards

Meet with foreman

Discuss longwall move activities

Condition of longwall

Condition of scoops

Condition of mule

Maintenance needed on scoops and mule

Attend safety talk

Required company policy

Discuss close calls

Discuss information passed on from previous shift

Discuss any stop work authority

Discuss roof control plan/condition

Required company policy

Discuss longwall move plan and activities for the day

Multiple tasks may be conducted at the same time

Find out what your task assignment is

Find out what other task are being performed and their status

Obtain and examine tools

Conduct Self Preformed Safety Assessment

lady slipper bar

solenoid wrench

flat tip screw driver

6 or 8 inch adjustable wrench

Other hand tools as needed

3. 3: Face Preparation

Start with 9 passes from end of panel

Get all shields straight faced

Adjust overall face height

Follow longwall move plan

Lower overall height 2 - 3" per pass

Increase height for mule clearance on last 4 passes

Place gopher drills on last pass

Load gopher drills on shearer

Unload gopher drills

Place two at mid face on pontoon at the toe of shield

Place one at tailgate at toe of shield

Return shearer to headgate cleaning bottom as you go

Look for loose roof and rib

Scale with shearer where necessary

Load bolting supplies onto shearer

Obtain 1 1/2" air hose

Hang reel of hose from shields

This is done at the same time bolts are being distributed

Attach end of hose to shearer

Travel to tailgate

Place hose behind base jacks as advanced

Pull end of hose to end of tailgate

Place roof bolt supplies on pass back to the head

This may take several passes to get roof bolt materials distributed

Place two roof bolts at toe of each shield

Place two plates at toe of each shield

Place two T-board at toe of each shield

Place one box of resin at every 10 shield intervals

Spot a couple sets of extra bolts supplies at 10 shield intervals

Clean bottom on each return pass and check for loose roof and rib

Normally takes 3 passes to supply the bolts

Set shearer for tear down at headgate

Spot face chain for removal

Stop chain so connection link is on headgate sprocket

Move shields so that the tips are within 5' of rib

Mark a 12' joint of PVC pipe at 5' from one end. Use this 5' mark from the rib/face to the tip of the shield as a guide.

4. 4: Supporting the Roof for Shield Removal

Obtain and examine tools and materials to attach air line

Flat tip screw driver

6 - 1-1/2" menders

Hacksaw or knife and extra blades

Extra drill oil

Staple locks ( 1/2" and 3/8")

Hookup air line to main source to the existing tee and cut-off valve

Put bands on hose

Slide hose on connector

May be necessary to lubricate

Tag air line out

Hookup gopher drill

Cut 1 1/2" air line

Install cut-off valve on each end of hose

Call headgate/tailgate to have air turned on

Hook up to oiler

Fill oiler with air tool oil

Hook shield water to drill

With 50' hose, tap on each shield, move as needed

Grease drill head as needed

Installing roof support

Set temporary jacks

Set jacks on unsupported side of shield

Keep your body under supported roof

Conduct gas test

Gas test must be made every 20 minutes

Set gopher drill between temporary support

Test the roof, sight, sound and vibration prior to drilling

Keep your body under supported roof

Set drill on the face side of pan line on skid plate

This gives the drill solid footing to push from

Place bits on steel

1 1/2" starter bit

1 3/8" finishing bit

Place steel in gopher drill head

Drill bolt hole and install roof bolt, resin and T-board

Turn air on at cut-off valve

Extend drill foot (trigger on left hand side)

Start head rotation slowly

Turn water on once bit is in hole with right lever

Remove starter steel

Install 4' driver with finishing bit

Raise drill head putting steel in hole

Lower the drill

Remove 4' driver steel

Put 4' pusher attached with 2' driver

Raise drill and put steel in hole

Proceed to drill 6'

Assemble 6' pin with plate and T-board and resin rod

Take resin and place in hole

Take plate, board and pin and put in hole

Put bolt wrench in drill

Take pin and put in wrench

Raise drill and push pin to top with board parallel with shield and face

Spin the bolt until tightened

Reposition jacks

5. 5: Remove Tailgate Drive

Obtain and examine tools

Lady slipper bar

Fire Extinguisher

Methane detector

Lock out/Tag out tail drive motor

Follow lock out/tag out procedures

Unplug at 8 bay box

Cut cable at junction box

Use bow saw/hack saw

Remove dog bone face side

Clean dog bone socket

Take out keepers

Remove dog bone

Place dog bone in pan line

Remove dog bone shield side

Same procedures as above

Cut face chain at tailgate

Make continuous gas test

Cut chain on the headgate side where the dog bones are being removed

Make sure you have 240 pound of rock dust and/or 10 pound fire extinguisher

Rock dust 10' in all directions

Male sure you have 240 pound of rock dust and/or 10 pound fire extinguisher

Cut chain on connection link

Shut torches down

Remove tail drive

Obtain 6' chain Grade 8 or higher

Hook to gob plate pin

Lower shield and hook chain to shield

Raise shield and pull pin out

Pull drive back to shield

Use rams on shield

Push drive back in face

Unhook relay bars

Slide out relay pin

Pull relay bar back using the ram on shield

Slide relay pin back in

Obtain duck bill scoop

Move unnecessary people out of the area

Remove drive with scoop

Bind the drive to scoop using the winch cable

Store drive in designated area

See longwall move plan

6. 6: Installing Pan Line Pinner with Duck Bill

Place pan line bolter on scoop

Drill head must point away from the scoop operator

Place bolter trapping shoe 12" to left of center hole on duck bill

Bind the bolter with winch cable

Tram the scoop to pan line at the tail gate

Lower pinner to bottom

Back out from under bolter until trapping shoe drops off of duck bill

Move scoop forward

Place duck bill on top of trapping shoe

Move scoop forward until duck bill comes in contact with trapping shoe pin

Lift the bolter up until the trapping shoe is even with the accu-trac

Push bolter on pan line with scoop

Take scoop binding cable off

Lock out/Tag out #6 cable from the distribution box at the headgate

Follow Lock Out/Tag Out Procedures

Splice the pinner cable

Must be done by qualified electrician

Turn the power on to #6 cable

7. 7: Installing Pan Line Pinner with Bucket Scoop

Place pan line bolter on scoop

Place bolter on the left side of scoop bucket drill head pointing away from the scoop operator

Hand rail of he pan line would be in the way

Pan line can be slewed with the ram

Bind the bolter to the scoop bucket with the winch cable

With the scoop bucket there is virtually no chance of the pinner falling off or sliding

Tram to the pan line

Drop the bucket

Loosen the winch cable

Back out from under the bolter until the trapping shoe drops below bucket

Tighten cable back up until bucket comes on top of trapping shoe

Raise bolter up to align with pan line

May have to slew pan line

Push the bolter on the pan line with the scoop ram

Remove scoop binding cable

Lock out/Tag Out #6 cable from the distribution box at the headgate

Follow Lock Out/Tag Out Procedures

Splice the pinner cable

Must be done by qualified electrician

Turn the power on to #6 cable

Title

Longwall Move - (Tear Down) Spider No.1

Subject

-

Company

-

Author

-

Version

59

Comments

-