METHOD FOR SUPPORTING MINING WORKINGS WITH LOOSE ROOF ROCK BY ANCHOR SUPPORT Russian patent published in 1999 - IPC

FIELD: mining industry. SUBSTANCE: according to method, bore-holes are drilled in roof during driving of workings. Load-bearing ceiling is formed, and anchors are secured in it. Bore-holes are drilled in roof rock with advancement of cut face by two runs. Drilled from them at side of working are inclined bore-holes with their extension beyond contour of pressing-out and dangerous deformations of rock mass in sides to value equal to 0.25-0.3 width of working. After that, solution of hardening mixture is injected into bore-holes, and load-bearing ceiling is formed over width of underground working with protrusion of ends of load-bearing ceiling beyond contour of pressing-out and dangerous deformations in sides to values equal to 0.25-0.3 of underground working width. Application of aforesaid method allows for reduction of supporting cost together with increasing stability of underground workings. EFFECT: higher efficiency. 3 dwg