FIELD: physics.
SUBSTANCE: method consists in defining module Eo (MPa) of general deformation and modulus of elasticity Eelast (MPa), internal friction angle 
of structured medium and its specific adhesion Ctcs (MPa), setting value of external pressure p (MPa) on deformable medium at preliminary calculated values of gravity (domestic) pressure 
at specified depth h of medium mass analysis total deformation compressed by die elastoviscoplastic (ground) material medium is defined by relationship 
where Stcs (cm) is elastic draught medium , SH (cm) is sludge medium with deformed structure, B (cm) is width of flat die, 
is diameter of circular die equivalent to rectangular with side B, Fd (cm2) is area of round stamp, νtcs and νH are values of coefficients of relative transverse deformation of deformable medium in structured and disturbed condition, defined by relationship: in a medium as 
and 
in walls of vertical mine 
and 
under conditions of compressive compression - 
and 
and 
- is strength parameters of medium with deformed structure and deformation of elastic flexible peat medium is determined from relationship 
where 
is peat modulus of elasticity (MPa).
EFFECT: disclosed is method for determining deformation of material medium under pressure.
