ABSTRACT
For analysis of stressed condition of rock massif in the vicinity of horizontal working methodology is used of tree-dimensional problems solution by the method of boundary elements. Three types of distribution of dimensionless stresses at untouched massif are dealt in whis paper: hydrostatic pressure (σ x 0 = σy 0 = σ z 0 =1, τ xy 0 = τ xz 0 =τ yz 0 =0); predominant vertical pressure, σ y 0 (σ y 0=1.00, σ x°= σ z 0=0.25, τxy 0 = τxz 0 = τyz 0 = 0); predominant horizontal pressure, σ max 0 =3.0, σ mid 0 =1.5, σ y 0 =1.00).
Calculations were carried out for dimensionless quantities at untouched massI.F. From the main working additional one is driven with length L, which equals 2 m, 7 m or 20 m, and at an angle φ, which in calculations was taken equal 15°, 45° or 75°.
Stresses are calculated at points of horizontal plane and at plane of the main working in sections located at the same distances (5.25 m) on the different sides of lines of crossing of lateral walls of the main and additional workings.
