Kairausnäytteistä

Kairausnäytteet, known in English as borehole samples or core samples, are cylindrical sections of rock or soil extracted from the Earth's subsurface using a drilling technique called core drilling. This method employs a hollow drill bit, often equipped with diamond or carbide teeth, that rotates and cuts into the ground, withdrawing a continuous cylinder of material. The retrieved cylinder is known as a core sample.

The primary purpose of collecting kairausnäytteet is to gain detailed information about geological formations. These samples are invaluable in various fields, including mineral exploration, geotechnical engineering, and hydrogeology. Geologists use them to study rock types, stratigraphy, mineral content, and the presence of fossils, which helps in understanding the Earth's history and identifying potential resource deposits.

In geotechnical investigations, core samples are analyzed to determine the soil and rock properties relevant to construction projects. This includes assessing strength, stability, and permeability, which are crucial for designing foundations, tunnels, and other infrastructure. Hydrogeologists use kairausnäytteet to understand groundwater flow patterns, aquifer characteristics, and the potential for contamination.

The process of obtaining kairausnäytteet involves specialized drilling equipment that allows for the extraction of intact, undisturbed samples. The depth and diameter of the boreholes, as well as the size of the core samples, can vary depending on the project requirements. Careful handling and preservation of these samples are essential to maintain their integrity for subsequent analysis and testing in laboratories. The data derived from kairausnäytteet provides a fundamental basis for informed decision-making in earth sciences and engineering.