The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 17, 2013
Filed:
Feb. 19, 2008
Applicants:
Martin Junker, Rheinberg, DE;
Armin Mozar, Hamm, DE;
Inventors:
Martin Junker, Rheinberg, DE;
Armin Mozar, Hamm, DE;
Assignee:
RAG Aktiengesselschaft AG, , DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21C 27/00 (2006.01);
U.S. Cl.
CPC ...
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.