Longwall equipment with a hydrostatic tube balance thereon for determining the height position of individual elements of the longwall equipment
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United States of America Patent
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Jan 5, 2016
Grant Date -
Apr 10, 2014
app pub date -
Dec 30, 2010
filing date -
Dec 30, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A Longwall equipment for mechanical extraction in longwall mining, in particular in underground coal mining, having a face conveyor arranged along the coal face, having an extraction machine which can be displaced along the face conveyor and having shield support units attached to the face conveyor at an angle thereto, is characterized in that, in order to determine the absolute height position of determined elements of the longwall equipment, a liquid-filled hydrostatic tube balance (17) is installed along the coalface (10) on the selected elements (12, 15, 31) of the longwall equipment and is connected to a base station (19) arranged in one of the gate roads (13, 14) and determined precisely in its height as a reference point, wherein pressure sensors (22) are incorporated into the tube conduit (18, 23, 24) of the hydrostatic tube balance (17), distributed over the course of the longwall equipment on individual elements (12, 15, 31) of the longwall equipment, and are connected to a central evaluation and control unit.
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