In order to optimize productivity, it is important to keep the drilling tools in good condition. It is essential to conduct the routine checks, to prevent damages and to ensure a safe operation before starting drilling.
confirm following information is very necessary:
• Alignment of the rotation unit with the feed beam and drill string support
• Condition of the drill string support
• Condition of the breakout system
• Lubrication system - function and setting
Drill string
• Drill pipes
-Dirt on threads
-Dirt inside pipe
-Damages
-Thread wear
-Cracks
-Outside wear
-Straightness
• DTH hammer
-Outside wear
-Cracks
-Chuck spline wear
• Drill bits
-Diameter wear
-Button wear, shape and cracks
-Exhaust tube wear and damages
Before drilling with the DTH hammer, the rig must be set-
up correctly in order to give stability and safety. If this is not done, the effects of feed force and rotation torque can cause the rig to move. This will have a negative effect on drilling,
especially when drilling deep, straight holes. When collaring the hole, make sure that the drill steel support is in good condition and able to support the hammer properly. Start collaring the hole with
reduced impact and feed, until the bit has entered the rock.
