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6 FAQs about [The-Hole Drilling Rig Hard Rock Video Tutorial]
How do you drill through hard rock?
Drilling through hard rock is a formidable challenge in foundation construction, demanding the use of specialized techniques and equipment to achieve effective results. Traditional rotary drilling involves a drill bit attached to a rotating drill pipe.
How do you drill a rock with a DTH hammer?
This method is mainly applied for hard to very hard rock and/or for penetrating large boulders. 1. Setting the DTH hammer with drill rod and casing on the drilling point. 2. Rotary and percussive drilling of the drill string under compressed air supply. 3. After reaching the final depth, unlocking of the drill rod with DTH hammer and pilot bit.
What happens if you drill in hard rock?
Drilling in hard rock can cause rapid wear-and-tear on drill bits due to the abrasive nature of the rock formations. This wear can lead to frequent bit changes and increased project costs. Hard rock formations often result in slower drilling rates.
How does a down-the-hole drill work?
In down-the-hole drilling a drill rod is fitted with a hammer at its lower end. The hammer, which is mounted on the drill bit, is activated through the addition of compressed air and driven into the ground – simultaneously rotating and impacting. A flushing current collects the loosened drill cuttings and conveys them upwards.
What is a down-the-hole drilling method?
The video shows the down-the-hole drilling method for very hard soil or rock. A rotary drilling rig, type LB 20, working with down-the-hole hammer inside a casing. A flushing current conveys the loosened drill cuttings upwards and exits at the upper end of the casing.
What kind of drill pipe should I use for hard rock drilling?
Standard drill pipes can bend or break under the extreme torque and rotational forces of hard rock drilling. Using heavy-duty drill pipes made from strengthened materials like reinforced steel ensures durability and resilience. Tungsten carbide is a material often used in drill bits for hard rock due to its exceptional hardness and wear resistance.


