ERECTION METHOD OF NON-CUTTING CONNECTION STRAP IN DRIFT WAY MADE IN MOUNTAIN SLOPE Russian patent published in 2014 - IPC E21F15/02 E21F17/103 

FIELD: mining.

SUBSTANCE: erection method of a non-cutting connection strap in a drift way made in mountain slope involves drilling of bore pits along the mine working outline, construction of an annular passage, laying into body of connection strap of two pipe lengths for delivery to the annular passage of cement grouting, installation into bore pits of steel rods, supply under pressure to the annular passage and bore pits of cement grouting. Connection strap is erected at some distance from the bore pit mouth, which exceeds distance from sliding surface formed in mounting slope to the bore pit mouth. Bore pits are drilled to the depth that is higher than propagation depth in the area of mine working, area of increased intensity of cracks occurring in massif at driving of mine working. Grouting mortar resistant to corrosive well water is delivered to bore pits, and distance between bore pits is determined on the basis of the following expression: S≤2α, where α - spread depth of grouting mortar to massif in the bore pit area.

EFFECT: improving erection reliability of a connection strap in a drift way made in mountain slope.

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