Grid composite for longwall shield recovery in underground coal and trona mines
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United States of America Patent
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Apr 6, 1993
Grant Date -
N/A
app pub date -
Dec 6, 1991
filing date -
Dec 6, 1991
priority date (Note) -
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status (Latency Note)
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Abstract
A grid composite for protecting men and longwall mining equipment during longwall shield recovery includes a regular polymer geogrid structure formed by biaxially drawing a continuous sheet of select polypropylene material which is heat bonded to a polyester fabric. The grid composite is secured over caving shields of longwall mining equipment during a longwall mining operation.
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