FIELD: mining, particularly to liquidate vertical excavations communicated with day surface.
SUBSTANCE: method involves partially removing support; filling excavation with inert material; constructing reinforced concrete platform in water-tight rock layer and reinforced concrete panel over excavation head. Reinforced concrete platform is formed at 10 m depth under water-bearing horizon ground. Water-proof screen has double thickness and includes inner layer of compacted clay and outer water-tight layer of plugging clay material.
EFFECT: increased reliability of water-bearing layer isolation for unlimited time.
2 dwg
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