NASA NTRS · 19850000241
Side Shield for Wall Support
Abstract
Method employs curved shield on each side of mining machine. In stowed position, shield folded against roof-support columns on one side. In deployed position, shield raised and braced against coal-seam wall by hydraulic cylinder. Shield supports wall until roof and wall properly secured by bolting and cement coating.
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Lewis, E. V.. 1985-10-01. Side Shield for Wall Support. https://ntrs.nasa.gov/citations/19850000241
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