FIELD: mining.
SUBSTANCE: method consists in plugging with quick-hardening resins, for instance, polyurethane, of a contour layer of the rock via blast holes with depth of 0.4-0.5 m. Injection of resin into the blast hole is stopped after its extrusion to the surface of the rock at the distance of 0.7-0.8 of the distance between adjacent blast holes within the rock support stage. Drilling of additional blast holes of design depth for plugging of the rock massif with mobile hardening mixes.
EFFECT: reduced cost of strengthening of rock massif around a mine due to reduced volume of plugging of expensive quick-hardening resins, possibility to withdraw and repeatedly use blast holes drilling heads, simplified injection equipment.
1 dwg
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