Scientific Drilling with the Sea Floor Drill Rig MeBo

Ergonomic Exposure Assessment on a Drilling Rig

A Dynamic Model for a Drill in the Drilling Process

The dynamic model of a drill in drilling process was proposed and investigated in this study. To assure a good drilling quality, the vibration variation on the drill tips during high speed drilling is needed to be investigated. A pre-twisted beam is used to simulate the drill. The moving Winkler-Type elastic foundation is used to characterize the tip boundary variation in drilling. Due to the v...

Learning CRF Models from Drill Rig Sensors for Autonomous Mining

This paper investigates an approach that combines ensemble methods with graphical models to analyse multiple sensor measurements in the context of mine automation. Drill sensor measurements used for drilling automation have the potential to provide an estimate of the subsurface geological properties of the rocks being drilled. A Boosting algorithm is used as a local classifier mapping drill mea...

Surprises from the sea floor

Unknown planet: Around 72% of the Earth’s surface is covered by oceans, and much of that surface is still unchartered territory for science. (Graphic: SuperStock.) More than seventy percent of the surface of our planet is covered by oceans. 88 percent of their area is deeper than 1,000 metres and thus difficult to access for research. There are only a handful of research submersibles that can d...

Effect of eccentricity of twist drill and candle stick drill on delamination in drilling composite materials

Drilling is the most frequently employed operation of secondary machining for fiber-reinforced materials owing to the need for structure joining. Delamination is one of the serious concerns during drilling. Practical experience shows that an eccentric twist drill or an eccentric candle stick drill can degrade the quality of the fiber reinforced material. Comprehensive delamination models for th...