FIELD: mining and construction industry. SUBSTANCE: method can be employed to measure parameters of stressed-deformed condition of rocks and solid building structures with the aid of down-hole springy transmitters and to evaluate contact forces in technical systems carrying uniaxial cylindrical members. Method determining contact force of types " full engagement " or " full slippage " in coupling of uniaxial cylindrical surfaces of jointly deformed members of composite system comprising medium ( rock ), cylindrical space-hole in rock and cylindrical member uniaxial to it consists in modeling of this system by KF transmitter. Contact problems of theory of elasticity are solved in advance by calculation with determination of maximum tangential stresses τmax in KF transmitter under contact conditions in coupling corresponding to " full engagement " and " full slippage " Then results of calculation are used to construct standard patterns of isolines τmax for each type of contact force in coupling with different parameters λ of stressed state of rock: -1 ≤ (λ = p/q) ≤ 1, where p, q are correspondingly minimal and maximal quasi-principal stress in medium ( rock ) of composite system in plane of normal axis of KF transmitter. Optical pattern of isochrones in τmax transmitter placed in cylindrical space of composite system is viewed in polarized light later. Structure of observed optical pattern of isochrones in this transmitter is compared with structure of built standard patterns of isolines τmax and sought-for type of contact conditions in coupling in which peculiarities of structure of optical pattern of isochrones observed in KF transmitter mostly match is determined. Method makes it possible to measure physical quantity that could not be measured before - contact conditions of type " full engagement " and " full slippage " with reference to composite systems which deform jointly with application of external forces and in which distribution of stresses after deformation appears to be different depending on particular type of contact conditions on boundary of contact between cylindrical member and cylindrical space. EFFECT: increased authenticity of method. 1 cl, 10 dwg, 1 tbl
