blindhål

A blindhål is a geological or engineering term referring to a type of drilling or excavation that terminates before reaching the full extent of the desired depth or target zone. Unlike a through-hole or borehole that extends entirely through the substrate, a blindhål only penetrates partway, leaving a closed or capped end.

In mineral exploration and geotechnical investigations, blindhåls are often used to collect samples or assess subsurface conditions without creating a complete passage. This approach minimizes surface disturbance and reduces construction or environmental impacts. In construction, blindhål drilling can be employed for purposes such as anchoring or testing subsurface features without creating a permanent access point.

The depth and purpose of a blindhål vary depending on the application. They are typically drilled using augers or rotary drills, with the drilling process stopping once the desired depth or geotechnical conditions are reached. After sampling or testing, a blindhål may be filled, capped, or left open depending on the specific project requirements.

The term "blindhål" is derived from Scandinavian languages, notably Swedish and Norwegian, where it translates to "blind hole." It emphasizes the concept of a drilled hole that does not connect to an underlying pathway or extend completely through the material.

Overall, blindhåls are valuable in scenarios where partial exploration, testing, or anchoring is preferred, offering a controlled and minimally invasive method for subsurface investigation.