FIELD: mining.
SUBSTANCE: outer layer is made of shotcrete, the main load-bearing structure is built from reinforced concrete blocks, without connection of the rings between each other, the elements of the water disposal system are passed through the holes in the reinforced concrete blocks, and the steel shell is placed between a layer of high-strength fibre-reinforced concrete and the main load-bearing structure.
EFFECT: increase in bearing capacity of the lining, decrease in steel consumption, providing the ability for exploitation of the well bore during undermining.
2 dwg
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