METHOD OF MINING OPERATIONS AT UNDERGROUND ENTERPRISES BY MEANS OF MINING WITH CAVING
FIELD: mining. ^ SUBSTANCE: invention refers to device for mining operations at underground enterprises by means of mining with caving. According to invention the following is provided: gate of drawing-off level is to have guidance rails fixed on bottom and layed in district between tail gate and ha...
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Format: | Patent |
Sprache: | eng ; rus |
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