Patents Assigned to RAG Aktiengesselschaft AG
  • Method for controlling longwall operations using boundary layer recognition
    Patent number: 8608248
    Abstract: A method for controlling longwall mining operations, having a face conveyor, at least one extraction machine, and a hydraulic shield support, in underground coal mining. At least one sensor is disposed on the shield support frames for acquiring solid-borne noise data generated by the engagement of the extraction machine in coal and/or country rock. A cut of the extraction machine into the country rock is determined in a downstream computer on the basis of recorded vibration data that corresponds to the generated solid-borne noise.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: December 17, 2013
    Assignee: RAG Aktiengesselschaft AG
    Inventors: Martin Junker, Armin Mozar