Authors: V.Р. Tatsienko, V.A. Gogolin, I.A. Ermakova, Lesin , A.S. Liskovets

Title of the article: Formulation of the problem of calculation of the support with filling of the space behind the support

Year: 2019, Issue: 3, Pages: 68-74

Branch of knowledge: 25.00.22 Geotechnology (underground, open and construction)s

Index UDK: 622.831

DOI: 10.26730/1999-4125-2019-3-68-74

Abstract: Use filling of the space behind the support in preliminary development allows to completely isolate development and changes capacity of the support. The existing methods for calculating the stress-strain state of rocks with filling of the space behind the support do not fully take into account the interaction of the blocks of the « support- filling layer - rock mass” system. The article presents the formulation of the problem of calculation of the support, taking into account the interaction of the system units. The axisymmetric state of the system in a hydrostatic stress field is considered. Equilibrium equations in stresses are written for blocks of annular form in the computational domain. Radial and circumferential stresses depend on the pressure on the inner and outer boundaries of the annular region and its radii. Arched three-piece support was replaced by a ring support to apply the dependencies. Such a replacement required the calculation of the equivalent cross-sectional dimensions of the support and the generalized modulus of elasticity. Equivalent dimensions of the support of rectangular cross section are established by the conditions of equality of the cross-sectional areas of the support and equality of the moments of inertia. The generalized modulus of elasticity was calculated for support of different profile. Comparison of the results of bench tests and calculated data on the carrying capacity of support and offset of the upper member was carried out. The calculation of the stress-strain state of the support is performed by the finite element method according to the licensed program ELCUT. The results obtained make it possible to correctly carry out calculations of support with the filling of the space behind the support.

Key words: arched support filling layer space behind the support stress-strain state

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