Inspection of open-pit mine drainage characteristics with a horizontal borehole camera

Horizontal bores and drains are crucial infrastructures for maintaining the stability of large open-pit mines. Induced deformations as result mining activities infiltration water from surface catchments during heavy rain events can cause build-up pore pressures in brown coal batters. This potentially lead to catastrophic slope failures. boreholes commonly installed at shallow inclines typically range length 150 400 metres. Due complexities surveying lengthy horizontal bores, long-term internal properties these structures poorly understood. In this research, a specialised borehole camera was developed observe factors influencing performance including identification fractured or jointed material, geometry features, locationally dependent outflow drainage paths. Investigations were undertaken an operational mine Latrobe Valley, located Victoria, Australia. Features observed on profile discussed, with emphasis providing in-situ material characterisation purposes stable