Face equipment comprising hose levels placed on the shield support frames of said face equipment
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United States of America Patent
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Oct 18, 2016
Grant Date -
Mar 12, 2015
app pub date -
Apr 2, 2012
filing date -
Apr 2, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A face equipment for mechanical extraction in longwall mining, in particular in the underground hard coal mining industry, includes a face conveyor (21) arranged along the coal face, an extraction mechanism (22) that can be moved along the face conveyor (21), and shield support frames (10) fastened at an angle to the face conveyor (21). In order determine the shield height of the extended shield support frame (10) corresponding to the face opening height, a flexible hose level (17) with a liquid-filled hose (18) is installed between the roof canopy (13) and floor skid (11) of individual shield support frames (10), and a pressure sensor (19) is arranged on the skid-side end of the hose (18). An inclination measuring device (25) is arranged on the roof canopy (13), and the pressure sensor (19) and inclination measuring device (25) are connected to an analyzing and control unit.
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