FIELD: mining.
SUBSTANCE: load-carrying flooring is built under thickness of dangerous rocks. Flooring has the type of grid consisting of series of wells drilled from lower wall to side wall of series of steep ore bodies inside which pre-stressed ropes are arranged. After tension of ropes, their ends are fixed on surface of walls of minings by means of pipes having L-shaped cutout. Wells are filled with curing mixtures. Development of deposits is performed after erection of flooring.
EFFECT: higher development safety of series of thin steep ore deposits.
2 cl, 6 dwg
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