FIELD: mining technology. SUBSTANCE: according to method, determined are systems of fissures which create structural blocks of rock with respect to geological splits in lateral cross-section. Incline bore-holes are drilled to depth going beyond contour of rock deformation, then rods are installed in bore-holes. Incline bore-holes are drilled in cross-sectional plane of underground working with deviation from normal at angle α = π/4 - (arctgf)/2, where f - coefficient of rock hardness according to Prof. Protodiakonov's scale. Depth of incline bore-holes is determined by following formula 
, where b = 1.8-2.5 m - distance from contour of underground working to external boundary of zone of fissuring around underground working (b = 1.8 m for underground workings driven to depth of up to 800 m, b = 2.5 m for underground workings driven to depth larger than 800 m in rock mass found in areas of higher stresses). At presence of natural systems of fissures, additional bore-holes are oriented according to normal with respect to main system which is shear risky. At clearly expressed fissuring and action of maximal compressing stress around underground working, additionally stabilized are sections of contour which coincide with direction of these stresses. At presence of natural fissuring of rock mass, stabilization of walls of underground working is carried out in areas of contour which are disturbed by natural fissuring without taking into account direction of acting compressing stresses. Incline bore-holes can be drilled with turning from plane of underground working towards work face at angle β. Application of aforesaid method ensures effective stabilization of rock mass in various mining and geological conditions. EFFECT: higher efficiency. 4 cl, 8 dwg
