test borehole

Test boreholes found that the original construction site effectively sat on the edge of a cliff.

The authorities there will be licensing the test boreholes on the basis of careful engineering designs.

There were test boreholes to be drilled, and rock analyses to be made.

The decision to build a tank rather than a vertical shaft was made after test boreholes found hard rock and high groundwater pressure in the area.

The survey confirmed the existence of the salt and a test borehole will be dug in Spring 2011 to confirm it has suitable mechanical properties.

A south Wales company wants to sink a test borehole near Llantrisant in its search for methane gas reserves.

Cross-section of tested borehole collapse sample.

But although test boreholes were successfully sunk at Altnabreac in Caithness in November 1975, the programme quickly ran into opposition elsewhere.

A prototype dielectric measurement tool was developed and proved capable of detecting a mylonite zone within a test borehole at West Cliff Colliery.

The delay was due to the fact that four test boreholes in the Sellafield area, the preferred site, did not provide sufficient information on the hydro-geology of the area.

Planetary scientist Britney Schmidt of the University of Texas at Austin has deployed a small, tethered robotic submersible through the test borehole.

Test boreholes were made here in the early 1970s, some of the boreholes have turned into irregular, artificial geysers, one of which exploded in 1999, leaving a crater.

Data on the subterranean environment is commonly obtained through drilling numerous test boreholes or investigating underground openings, hazardous and time consuming work that does not always reveal the most appropriate site to sink a water well, the researchers say.