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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 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. 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 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 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 Cable comes from drill through shieve back to drill Positioning Use mast and boom to balance machine Electrical storms Lower mast and shut down machine Report to supervisor Caved-in holes Drill adjacent hole (1-2' distance) Fill unused hole with dirt Stuck steels Attempt to remove Check with supervisor Drill adjacent hole (1-2') Fill unused hole with dirt Compressor fire Use extinquisher Do not open doors if hot to touch Stored on compressor Stored in truck Notify supervisor/co-workers in area Medical emergencies Provide first aid Request assistance Communications Provide two-way radio Spills Diesel Hydraulic Motor oil Fuel Use 55-gallon drum to clean up and properly dispose of Used as a by-product (asphalt plant) End-of-shift Grease Hammer Sprockets on mast Centralizer Grease entire machine weekly Examine machine while greasing Park drill May be left at last hole Depending on distance from wall/face 20' rule Shut compressor down Relieve pressure on machine by closing solenoid Pressure should drop to 40 psi Turn compressor motor off Inventory of supplies for next shift End-of-shift report Transporting drill Lower and secure mast Stack hose on compressor Place hose from rear of compressor in a zig-zag, side-by-side pattern Each loop of hose will hang off each side of compressor Secure with bungee cords Connect compressor to the drill Pentil hitch May need to use swivel adjustment to connect Clean work area Pick up tools If necesary to transport by truck Clean down machine Move drill Check/clear/level area prior to moving Plan your move Start compressor up Use controls while walking along side of drill Use mast as counter-weight Use boom to assist with drill balance Keep tracks at same speed Operator needs to stay clear of tracks Avoid wearing loose clothing Footing Avoid pinch-points Between drill and compressor Drilling Level/plumb mast Extend boom 2-3' to hole marking Lift front of tracks to apply downward pressure to mast 15' or less to wall Wear fall protection Drill first row of holes 20' from wall Use these drill holes for tie off Lower drill bit and rod to ground Ensure first rod is always clamped down Engage and lock centralizer Turn on rotation Start hammer Slightly open water valve Start lowering hammer Once you being drilling, turn on the air Apply necessary pressure for hammer to go down Overpressure  - will lift the mast (rotation very slow, may lockup) Underpressure - will cause rods and hammer to separate Striking bar should go 2-3" inside hammer at all times Leave water on for first 10' when it is solid Drill until coupling is about 2" from contacting the centralizer Turn off water Examine hole for possible voidance Re-line hole with cuttings Up to 30' depth only Ensure 10' are good Add rod Leave clamps on Turn off rotation Turn on hammer and air to separate the striking bar from the coupling Put in reverse Raise hammer all the way up Place grease on coupling end Remove rod from rack Place new rod on top of other one Align rod with striking bar and hammer Lower hammer slowly and turn on rotation (slowly) Rotation should always be counter-clockwise Once striking bar grabs coupling of new rod, release Ensure the two rods are connected Observe both top and bottom couplings at same time If you have to physically touch the rods, make sure rotation is in neutral Raise both rods up all the way to make sure hole is done right, clear of obstruction, etc Open centralizer Turn on rotation, hammer and air Slowly lower the hammer Once drilling begins, reset rod pressure Drill until you can grab the other rod and slide it over and place it on existing rod Repeat process until desired depth is reached Remember to ensure hole is clear for each additional rod Drill an additional 5' from the face height Remove rods Put rods all the way down Give it some pressure Turn on hammer and air to break rods Listen for clicking sound Indicates rods are loose Begin picking up rods and lower centralizer Once rods are up to couplings Bottom of coupling must sit on top of centralizer Put rotation on reverse and slowly raise hammer to begin unscrewing Once unscrewed, lift the hammer all the way up the mast Manually unscrew rods and place on rack Repeat process until you reach last rod On last rod, place lock on centralizer Tension drill bit to centralizer Measure hole depth Retract the boom about a foot which will drag back the mast and prevent material from falling back into the hole Raise the boom Don't fight the machine Cover/plug all holes Use anfo bags Cone-shaped plugs