MSHA - Interactive Training - JTA Spiders

	Home \| Table of Contents \| Overview Map \| Icon Legend
	Roof Bolter Operator
	Contact: Palmer.Melvin@dol.gov

Bits

Inserts

Bit clips

Drill steel

Drill wrenches

Reflectors

Dust filters

Rope hangers

Meet with foreman

Discuss roof control plan

Bolted/unbolted areas

Attend safety talk

Talk with previous shift bolter operator or check white board

Supplies

Condition of roof

Condition of bolting machine

Maintenance needed on roof bolter

Test holes

Entry width

Enter the mine

Get on mantrip

Put on safety glasses

Ensure everyone is seated before mantrip moves

Ensure mantrip had been pre-oped

Ensure clearance is granted

2. Arrive at workplace

Exit mantrip

Conduct work place examination

Observe for mobile equipment

Check for bad top

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

Check for loose ribs

Start at corner of last open crosscut

Check for cracks

Check for brows

Check for sloughage

Look for uneven bottom

Undulation

Check for slip/trip hazards

Look for crib blocks, rock, banding material, cable, bolts

Check ventilation

Check fly pads

Check line curtains

Check for damaged bolts and bolt spacing

Visually inspect roof bolter cable

Check for flat places

Check for torn jacket

Ensure cable is hung properly

Insulated hangers

Insulated wire

Correct and/or report any unsafe conditions

Conduct work place examination

Repeat examination for each cut bolted

Observe for mobile equipment

Check for unsupported and bad top

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

Scale loose top with slate bar, if necessary

Spot bolt any area that can't be scaled

Check for loose ribs

Start at corner of last open crosscut

Cracks

Brows

Sloughage

Support or scale any loose ribs

Look for uneven bottom

Check for slip/trip hazards

Check ventilation before tramming through

Check fly pads and line curtains

Curtain must be maintained within two rows of bolts at all times until it is within 10' of the face

Avoid standing behind line curtain

Check for methane with spotter

1' from face/roof/rib

If magnet on head of miner is not used you must use a probe

Check for damaged bolts and wide bolt spacing

Correct and/or report any unsafe conditions

Ensure reflectors are installed on second row of bolts from face

3. Conduct dust parameter exam

Energize machine

Check dust boxes

seals

filters

latches

Check water boxes

Check suction on drill head

Check cut ventilation

Report completion of exam to foreman

Foreman is required to record

4. Pre-op on Roof Bolter

Ensure everyone is clear of the red zone

Check fire suppression

Check panic strip

Check operational controls

Make sure levers don't overlap or stick and proper "C" clips

Check boom up/down/rotation, foot jack, swing control, canopy jack, fast feed, torque valve, and boom extend

Check Tram controls

Deck

Make sure levers don't overlap or stick and proper "C" clips

Check front lift

Check rear lift

Check cable reel take-up

Check panic strip

Check right and left tram controls

Check foot control

Inch Tram

Make sure levers don't overlap or stick and proper "C" clips

Check the ATRS functions, ATRS up and down, ATRS extend, ATRS front lift, ATRS beam extend, and right and left tram controls

Check lights

Check bolts/pins on canopies

Check slate bar

Check grease gun

Check for probe

Check for torque wrench

Check for pre-op sticker

Look for hydraulic fluid leaks

5. Untitled

Tramming

Communicate to others before starting roof bolter

Verbally

Get out of the red zone before restarting bolter

Hang cable and tie off at last open break

Use existing roof bolt

Walk to and examine new work area

Ensure gas test is taken before tramming bolter to the face

Ensure quality work place exam is conducted

Ensure proper ventilation is provided

Tram bolter to next work place

Swing booms in

Raise booms

Raise up foot jacks

Lower boom canopies

Ensure front of machine is off the bottom and the rear of the machine is not in the top

Ensure the ATRS is lowered

Disengage the reel valve

Allow the cable to free spool, if necessary

Make sure all levers in deck are centered

Tramming bolter from inch tram controls

Engage the diversion valve

Push valve down from deck

Locate last row of bolts

Inch tram forward to last row of bolts

Off side operator must be at least two rows of bolts back

Extend ATRS boom out

Extend ATRS beam out

Set ATRS against roof

Engage inch tram diversion valve to begin drilling

6. Drill test holes

Drill test hole at least 1 foot deeper than the length of bolts installed

Review approved roof control plan and/or mine policy for exact location of test holes

Watch for steel to jump

This comes with experience

Look, listen, and feel for changes in the roof

This comes with experience

Measure test hole

Drag tip of tape measure against side of hole while withdrawing

Catches with the tip of the tape measure indicates separation or cracks

Mark test hole

Depth

Person who drilled the test hole

Paint test hole

Leave test hole open

Determine the length of bolts

All bolts must anchor in at least 1 foot of solid roof at the end of the bolt

Notify section foreman to determine supplemental support if you are unsure

7. Drilling and installing roof bolts

Advance bolter 4 foot from last row of bolts

Set ATRS

Refer to drilling test hole

Swing booms out no more than 4 foot from rib

Use 48" roof bolt to measure distance

Use marked drill steel

Set foot jack

Set canopy

Do not pressurize canopy against top

Examine roof

Sight and sound, at each drill hole location

Place starter steel in drill pod

Hands off drill steels are used

Keep body from over the boom

Raise boom, put steel against the roof, begin rotation and up pressure to the right depth of the hole

Look, listen and feel

Discuss up pressure and rotation with trainee

Drop boom and add pusher to finish depth of hole to same length of bolt

Discuss methods of extracting steel from hole

Get resin

Get bolt and plate

Insert resin into hole

Insert bolt with plate

Push bolt up with boom within 1 inch of top of roof

Rotate 3 to 8 seconds

Rotation 35 revolutions

This mixes the resin

Push bolt and plate against roof

Hold until resin sets up

Follow manufacturer's directions

Drop boom

Keep body from under boom

Swing boom in 4 to 5 feet

Repeat drilling process

Torque first and third bolt on the first row installed

Use torque wrench

Refer to roof control plan for torque specs and report torques that do no meet the minimum requirement

Torque second and fourth bolt on the fourth row than alternate every four rows after

If you follow this sequence, you check the mandatory 10 percent of all bolts installed

Make gas test with probe

Before entering work place

Every 20 minutes thereafter

Advance line curtain as bolting progresses up to the second line of roof bolts outby

Bolt as close to face as possible

Place reflectors/streamers on second row of roof bolts outby the face

Clean dust box every second cut

In the last open line of breaks

Wear respirator

Keep air at your back

Remove pan and dump on ground

Clean filter

8. Service roof bolter

Grease pot

Grease leveling arm

Grease swing arm

9. End of shift activities

Report conditions to foreman or next bolt crew

Problems

Supplies

Things that was done to correct problems

Hang reflectors

Properly dispose of damaged resin

Move the machine to the last open crosscut

De-energize machine if necessary

Go to mantrip, do a head count

Tag out

Place methane spotter on charger

Place cap light on charger

Make notations on white board as needed

Go home

Title

Roof Bolter Operator

Subject

Company

Author

debbie combs

Version

Comments