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Longwall Move (Tear Down) Spider No.3
Contact:  Palmer.Melvin@dol.gov
1. 15: Preparing Shields for Removal
Conduct Exam
Obtain and examine tools
Pull rope
Channel locks - 320 and 640
Hammer
Lady slipper bar
Chisel
Punch
Rock bar
Penetrating oil
Staple puller
Anti seize
15/16" socket ratchet-3/8" drive
Side cutters
Manually relieve pressure on each shield by pushing solenoid button
Listen for pressure release
Uncouple manifold lines 1 1/4" pressure lines and a 2" return on the tailgate side of each shield
Take the hoses that have been uncoupled from the tailgate side and loop back and re-couple in the shield they are attached to
See diagram
This must be uniformly done on each shield
Remove the 3/4" plug from the manifold and tape it to the looped hoses
Caution: If manifold is not opened and is pressurized, serious injury could occur
Remove water hose from tailgate side
Take loose end of water hose and put in between legs of shield
Disconnect the shield to shield cable on the tailgate side of PM 4
Pull staples
Replace staples after cable is separated
Roll cable up, tape into roll and place between legs of shield
Take the chain through the relay bar and fasten to the pin at the base lift jack
Use 15/16" socket wrench
Take the bridle off the base lift jack
Take the hose off the tailgate side of the base lift jack
Remove the hydraulic hose off the base lift jack on the headgate side at the source (headgate leg)
Take this hose and connect it to the port that is open on the base lift jack
Take the hose that was previously in the base lift jack, tailgate side, and put in open port of leg jack
See diagram
Lay base lift jack down on the relay bar
Turn KN valves off on each shields
Failure to turn the KN valve off could allow the shield tip to float down
Continue on each shield to the headgate
2. 16: Remove Electrical Components
Conduct Exam
Obtain and examine tools
Side cutters
Remove phone
Pull magnetic mounted phone from canopy
Cut phone cable
Lay on toe of shield to be recovered
Remove lights
Slide lights out of rubber mounting brackets
Unplug cable at light, splitter, and neighbor shield
Roll up cable and place on toe along with light fixtures
Disconnect and remove all cables from power supply box
Use 620 channel locks
Turn brass nut counter clockwise until it can be removed by hand
Place PVC protector on all plugs and receptacles
It protects the threads
Roll up, tape, and put on toe of shield
Remove light power supply box
Pull pin from bracket
Tilt box toward gob
Lift box out of holder
Replace the pin
Continue this process for each shield to the headgate
3. 17: Clear the face
Conduct Exam
Contact scoop operator
Load part box in the bucket of scoop
Caution: Communication between the scoop operator and employees loading the materials into the boxes is essential
Have the scoop with the box travel from tailgate to headgate
Load all loose parts in the box
SCSR
Phone
Light cables
Splitter
Lights
Fire extinguisher
Power supply boxes
Load boxes onto the flat car for transporting
Secure with chains and binders
Scoop the face
4. 18: Final Set-up for Shield Removal
Conduct SPSA Exam
Obtain and examine tools
Hammer
Screw driver
Channel locks
Chisel
Lady slipper bar
1/2" High pressure hose (1200 feet)
Ten 1/2" cut-off valves
24 to 26 couplers and 50 1/2" staples
Two 1/2" tee
One 1/2 - 3/4" male to male staple fitting
3/4" staple lock coupler
620 Scoop
Starting at the dump valve on the stage loader run 1/2" hose to tailgate with cut off valve every 100'
Install the first tee on the corner at the headgate
Run second line from the tee to the track with cut off valve on the end
Set the walkers in place at tailgate
Notify all personnel in the area of the danger of setting walking shield. Shield could slide off duckbill. Use start up signals before starting scoop and moving
Hook 1/2" hose to the face side walker
Uncouple the ring line hoses from storage on the walker shield
Connect the hoses from walker shield to other walker shield
Plug open ports on walker manifolds
Remove the 1/2" plug from the manifold of the gob side walker and install 1/2" cut off valve
Install 10" 1/2" hose to cut off valve
Install 1/2" tee with two cut off valves with one being on the hose
See diagram
Install 1/2" to 3/4" fitting
Install 3/4" coupler
Disconnect the 3/4" hose from the pressure valve on the line shield and connect to the 3/4" coupler from the walker
5. 19: Shield Removal
Conduct Exam
Build cribs per Roof Control Plan
See diagram
Tram mule from track to 65 shield with cable on machine
Establish cable anchor at approximately 65 shield
Tram mule to the tailgate
Someone must be assigned to watch the cable to be sure you have enough to reach the tailgate
Tram the mule back to the track
Someone must be assigned to watch the cable to be sure you have enough to reach the track
Someone must be assigned to watch the cable to be sure you have enough to reach the track. Before the mule returns to the tailgate the cable must be manually move to the toe of the shield
Tram the mule back to the tailgate and hook to the face side walker
Use bridle bar and d-ring chain
Use bridle bar and d-ring chain
Put pressure on the line shield
Hook GPU to shield to shield cable for shield electrical power
Lower the shield 18" from the roof
Advance the mule and face side walker within 6" of the last shield set in top
Be aware of pinch points and close clearances
Only one person needs to direct the mule operator
Avoid lights in operator's eyes
Notify all personnel in the area of the danger of close clearances and moving equipment. Use start up signals before starting mule and moving. Communication should be maintained with everyone involved.
Pull mule up to the gob side walker and hook to relay bar
Advance the mule and gob side walker within 6" of the last shield set in top
Be aware of pinch points and close clearances
Only one person needs to direct the mule operator
Avoid lights in mule operator's eyes
Unhook mule from walker
Swing boom to the line shield
Hook D-ring to the toes of the line shield
Lower shield to transport level
Pre-measure transport height marker
This could be a stick or PVC pipe
Bleed pressure line between gob walker and line shield at 1/2" cutoff
Unhook pressure line from line shield
Unhook GPU from line shield
Communicate with people in face area and mule operator
Lift toe of shield to raise toe from bottom with mule boom
Swing mule boom until the tip of the shield is within 6" of the face
Caution: The mule may swing toward the shield line
Retract the mule boom and pull shield toward headgate
Make sure the line shield canopy stays on top of the mule boom to prevent breaking chain
Tram mule to headgate pulling shields to load out area
Build crib to replace shield that has been extracted
Follow the Roof Control Plan
Caution: Use a roof spotter, have a planned escape route
Load mule with roof control material for the next shield
Repeat process for entire shield line
6. 20: Loading Shields for Transport
Conduct Exam
Obtain and examine tools
Lady slipper bar
12" Chain
Solenoid wrench
5/16" Bolt, Nut, Washer
Stop mule so the shield in tow is in the center of the intersection
Pick toe of the shield up with boom of mule
Tram duck bill scoop under shield
Shut all equipment off
Put chain in relay bar in the back of shield
Caution: Rock may slide off the back side of shield. Clean any visually loose rock off the shield prior to installing the chain
Notify duck bill operator and mule operator when you are in the clear
Ground man is the only person to give signals to equipment operators
Equipment may not start until ground person has made contact with both equipment operators
Prior to starting either the duck bill or the mule an audible warning must be given
Start mule
Lower the boom
Unhook bridle chains
Back mule up 5'
Swing boom left clearing shield
Raise boom to level of the canopy
Swing boom to right to make contact with the shield tip
Utilize the boom to line shield on duck bill
Ensure the ground person instructs the operator that everyone is in the clear
Return mule to tailgate to get next shield
Screw driver
Observe area
Stop all activity in loading area if any miners are in the travel area
Lift shield with duck bill 12" to 14" just enough to clear the shield car to load
Approach the shield car slowly
Get the gob side of the shield over the car until the duck bill touches the shield car
Lower the duck bill, allowing the end of the shield to rest on car
Back the duck bill away from the car until the duck bill is within 10" of edge of toe
Raise the duck bill until it takes the weight of the shield
Swing the duck bill hard to left without tramming
This should put the shield on the car so the duck bill can be trammed out from under shield
Lower the duck bill
Straighten the duck bill scoop up
Back the scoop up until you clear the toe of the shield (completely from under the shield)
Raise the duck bill level with base of shield
Tram forward slowly to align shield on car
Shield may tip or lift slightly on duck bill side as it is being aligned
Check height of shield for transportation
Follow Longwall Move Plan
Build a crib under any canopy that shows signs of drift down
Clean the top of shield
Bind the shield to the car utilizing binding chains and binders
See diagram
Spot the next shield car
Set up for next shield
Repeat the process until shields are removed
About
Title
Longwall Move (Tear Down) Spider No.3
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Company
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Author
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Version
64
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