Stresses in the concrete lining of tunnels located in heterogeneous mountain massifs

The presented studies confirmed stress formation patterns in concrete supports, which are the sum of gravitational, tectonic, and variable components, especially areas with active geodynamics. problem underground workings lining reliability is due to need solve problems determining stress-strain state level, taking into account all listed components forces strength properties. main parameters transport tunnel support determined using unloading deformations. For unloading, a borehole drilled core sampling. In drilling process, linear deformations measured three directions, for delta socket strain gauges installed on surface. taken from also used determine actual class modulus elasticity. Principal principal stresses analytically. As result measurements, were identified sections that work mainly rock pressure significant contribution horizontal stresses, relationship was established between tectonic fault cracks trajectories mountain massif. practice, it proposed take when designing special scientific support, and, accordingly, reinforce lining. During operation geodynamics, ensure safety, recommended use automated deformation control changes its state.