Epiroc Rock Drills Aktiebolag

Erik Jakobsson

Mattias Göthberg

Samuel Enblom

Robert Pettersson

Harald Merkel

Martin Persson

A pulsed power drilling tool configured for passing a pulsed electrical current through a mineral substrate to break the mineral substrate, the drilling tool including: a pulsed power generator for generating high voltage current pulses, a drill head including at least one pair of a first electrode and a second electrode, the first electrode including a first solid electrode portion and the second electrode including a second solid electrode portion, the first and second solid electrode portions being galvanically connectable to the pulsed power generator, and at least one ionization device configured for generating at least one ionized fluid volume extending at least from the first solid electrode portion to a surface of the mineral substrate, to allow a high voltage current pulse to pass between the first solid electrode portion and the second solid electrode portion via the at least one ionized fluid volume and the mineral substrate.

Pulsed power drilling tool and a method for breaking a mineral substrate

A method for estimating a level of stress that a mine truck is subjected to. The mine truck includes a frame; a container for carrying payload supported by the frame; and at least one sensor, the at least one sensor delivering signals being dependent on a force acting on the mine truck. The method includes for at least a first position of the frame, estimating a level of stress that said at least a first position is subjected to in response to a force acting on the mine truck, wherein said at least a first position is a position being different from the position of said at least one sensor; and estimating said level of stress utilising a model representation of the level of stress for said at least a first position wherein said model representation output said estimated level of stress utilising sensor signals from said at least one sensor as input signals.

Method and system for controlling a mining and/or construction machine

A method for determining efficiency of a drilling process comprising the steps of: transferring energy via a tool member to the material in which drilling is to be performed by means of a drilling configuration; detecting waves which are propagating in said tool member of said drilling configuration during drilling as a result of energy provision; detecting said waves by means of at least two sensor means arranged on mutually opposite sides of said tool member adjacent to, on a certain distance from, said tool member, which sensor means are based on inductive and/or capacitive detection of said waves in said tool member; and based on results of said detection, determining said efficiency of said drilling process.

Growing community of inventors

Vintrosa, Sweden

Erik Jakobsson