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GRID COMPOSITE FOR LONGWALL SHIELD RECOVERY IN UNDERGROUND COAL AND TRONA MINES
GRID COMPOSITE FOR LONGWALL SHIELD RECOVERY IN UNDERGROUND COAL AND TRONA MINES
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机译:地下复合煤层和特纳矿的网状复合材料
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摘要
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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