FIELD: mining, particularly to develop thick gently sloping potassium-salt formations.
SUBSTANCE: method involves contouring excavation block with development entries; cutting block stock in chambers along with yielding pillars establishing between the chambers. Drive extending from development entry is formed before block stock development and chambers are excavated with the use of mining machine from the drive in cuts beginning from lower sylvinite layer. The development is carried out in layers. Each layer is developed in cuts having volume equal to halite or sylvinite volume to be loaded in vehicle along layer having the greatest thickness. Cut sylvinite is supplied to day surface, cut halide is used as filling material for adjacent worked-out chamber filling.
EFFECT: increased quality of sylvinite ore and increased reliability of mine roof control.
3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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| METHOD FOR OPEN-UNDERGROUND MINING OF THICK FLAT COAL BED | 2011 |
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