Introduction and Use of the Borehole Camera in Mining-Related Investigations

Background: One of the more valuable tools used in mining-related hydrologic investigations can be a borehole camera. It can dispel to some degree the old adage that you cannot see under the ground. This instrument permits viewing and video recording of boreholes, domestic wells, mine shafts, open sink holes and other vertically accessible subsurface avenues.

Camera Specifics: By and large these cameras are portable and operate from either a 12 volt DC connection to an automotive battery and/or by common 110 volt AC household supply. The images can be recorded by an integral digital (DVD) system or 8 mm videotape. Additionally, the camera can output to an external DVD or VHS recorder and/or an auxiliary TV. Most systems have a depth readout that displays on the viewer and is recorded or there may be a separate depth indicator. Some systems also come equipped with depth-marked cable. Most systems also have sound recording capabilities. Manual and power winding mechanisms are available. The latter is recommended.