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Use Of Polymer Grids For Longwall Shield Recovery
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Citation (Style = APA)
Travis, Brian E. (1990). Use Of Polymer Grids For Longwall Shield Recovery. Tenth International Conference on Ground Control in Mining Proceedings (ICGCM) 10th
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Travis, Brian E. (1990). Use Of Polymer Grids For Longwall Shield Recovery. Tenth International Conference on Ground Control in Mining Proceedings (ICGCM) 10th
Citation Downloads
Reference Manager (RIS)
SpreadSheed (CSV)
Organization: International Conference on Ground Control in Mining
Pages: 7
Publication Date:
Jan 1, 1990
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Abstract
Abstract
| The recent development of polymer grids for the underground coal mining industry has created new alternatives for supplemental ground control practices. The grids utilize strong, lightweight polymers - usually special grades of polypropylene. High tensile strengths and resulting load support characteristics are achieved by molecular orientation of these polymers in the manufacturing process. One of the most important applications of polymer grids as supplemental ground control is in longwall shield recovery. When shields are moved from one face to another, the determining factor in the success of the recovery is the ground control provided by roof support structures along the old face. Whereas primary support is usually provided by roof bolts and cables which run the full width of the panel, supplemental support is often provided by metallic meshes of welded wire or chain-link fence. lightweight, high-strength polymer grids replace these heavy, cumbersome metallic meshes, giving the operation increased productivity by decreasing installation time and reducing injury downtime. |
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