METHOD OF OPEN-UNDERGROUND EXTRACTION OF COAL PILLARS LEFT BETWEEN MINE-FILED BOUNDARY AND PIT WALL

FIELD: mining. ^ SUBSTANCE: method includes extracting coal pillars by conducting shrink stoping from pit wall to mine-field boundary and leaving supporting coal pillars between shrink stoping. A coal pillar is divided into blocks; supporting coal pillars are left between the blocks so that the widt...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ZUBOV VLADIMIR PAVLOVICH, OSMININ DMITRIJ VALER'EVICH
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS MINING MINING OR QUARRYING
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