The drilling rig is located, obviously under the white cloth that protects all from the weather.
The video shows the most important parts: the system that mixes and then inject the cement that creates the hole walls, which slide down the metal pipe that carries the carrots, currently more than 6 cm in diameter, the tower and the mechanism of rotation of the drilling head.
The piercing tip that you can see in the picture is obviously hollow.
the first step is to create a cylinder of larger diameter of the core extracted. in this cavity is injected with a special resin cement that they do harden quickly. It is thus built a wall to prevent landslides in the rock around the cavity itself.
Only later, another tip creates the carrot that will be extracted.
workers you see are all New Zealand.
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