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

Driller

1. Start of Shift

Clock in at scalehouse

Talk to supervisor

Get instructions

Hole depth

Pattern

Drill location

Amount of drilled holes

Discuss Ground hazard analysis

Tool box meeting

Safety issues

Productivity issues

Enter Sub-topic

Conduct site inspection/workplace exam

Boulders

Obstacles

Area

Cracks

Loose materials

Document completion of inspection/exam

Imminent danger issues

Fall hazards

Obtain necessary fall protection equipment

Obtain necessary supplies

Fuel

Lubricants

Drill rock oil

Hydraulic and motor oil

Rags

Brake fluid

Brake cleaner

Water

Ear plugs

Dust mask (in bulk)

Safety glasses

Penetrating oil

Conduct Part 46 Training

2. Equipment Pre-op

Compressor

Check oil levels

Check transmission fluid (Dextron 3)

Check anti-freeze

Check guards

Check straps and hoses

Check tires

Check for fluid leaks

Check battery

Check chocking/blocking

Check hose couplings for safety ties/retainers

Belts

Compressor and alternator

Drill

Check oil level

Check hydraulic fluid level

Check rock drill oil level

Check water level

Check hydraulic and air hoses

Check tracks

Loose bolts

Cleats

Rust

Wear and tear

Sprockets

Idlers

Rollers

Track tension

Make any necessary adjustments

Check drill mast

Links

Wear

Cracks

Welds

Centralizer assembly

Rod retainer

Air hoses

Hydraulic oil hoses

Rod couplings for cracks

Controls

Tightness

Leaks

Check rods

Threads

Straightening

Bends

Drill bits for wear and tear

Couplers

Cracks

Threads

Breakage

Check striking bar/hammer

Wear and tear

Bushing

Leaks (air, water)

Threads

Enter Sub-topic

Check drifter

Shims

Wear and tear on guide

Leaks

Check steering

Check for cracks in frame, etc.

3. Start up

Press down on by-pass

Hold by-pass for 20 seconds

Turn ignition key on

Let idle

At least 10 minutes in cold weather

At least 5 minutes in warm weather

Check compressor gauges

Air pressure

Aprx. 40 psi at startup

120 psi working

Oil pressure

40 psi

Air temperature

Check on max

Water temperature

180 - 200 degrees

Voltage

24-volt

Turn air solenoid switch on to drill

Look/listen for air leaks

Enter Sub-topic

4. Pattern Set-up

Check area

Ground Hazard Analysis

Level area if needed

Remove berms/boulders if necessary

Place necessary signage

Restricted/blasting area, etc.

Check with supervisor

Number of holes, depth, spacing, burden

Driller determines pattern

Consult with supervisor

Consider wall angle and toe for first line

Try to keep pit bottom level for haulage operations

Square pattern off

Measure off drill hole pattern

Use stemming pole or tape measure

Measure first and second rows

Begin drilling with second row

Second row will be used for fall protection

Drilling subsequent rows

Measure off as needed to keep rows as straight as possible

The closer the holes are, the finer the shot rock will be

The farther apart the holes are, the larger the shot rock will be

Always recheck holes

5. Unusual Conditions

Water in holes

Check holes for water

Could result in overloading and/or bad shot

Over six inches of water

Pack with shavings to absorb the water

Blow hole out with drill air

Drilling on steep slopes

Using wench

Get assistance

Not a one-person job

Communications between drill operator and wench operator

Need to coordinate activities

Establish anchor points

Examine cable and hook for defects

Crosby clamps

Never saddle a dead horse

Use separate anchor points for machine and driller

Anchor for machine must be a much heavier rod than one used for personal fall protection

Use a shieve wheel at the anchor point

Always have a double hook-up to the drill