The results of a study of the effect of hardening the roof of workings of small length, of arbitrary shape, with a cross section of up to 80 m2, with advanced anchoring, which can significantly reduce the displacement of soil outcrops, are presented. The analysis shows that it is not possible to completely eliminate soil fallouts; therefore, a complex of studies of a stress-strain (SSD) soil mass, reinforced with a protective screen, was carried out. Finite element modeling (FEM) has established that advanced anchoring up to 15 m long does not work effectively, since the anchors are located in the zone of soil slippage. Increasing the length of the protective screen anchors to support their ends outside the sliding prism makes it possible to increase the stability of soil outcrops in the face.

Keywords: underground construction, stresses, displacements, hardening, anchoring, modeling, finite element method

The huge part of Russia territory is located in the permafrost zone. Mastering of this area is important step for Russia, because the mining is developing at a rapid pace, and mostly oil and gas. There is its own specificity in the construction of buildings and structures on permafrost. Peculiar properties of foundation in the permafrost zone are considered in this article.

Keywords: foundation, permafrost, thermosyphon, oil storage, oil and gas industry, drilling, ammonia

Using simulation and finite element method calculations of stress-strain state of monolithic concrete support for underground structures with non-circular outlines made of fast-hardening concrete are carried out in the paper. Based on the obtained results, the maximum stress zones and their magnitude in the reinforced concrete support are established. The stresses are compared with circular-form supports. The factors influencing the stress state of the support are determined.

Keywords: Underground structures; soils; concrete support; voltage; the experiment plan; modeling; finite element method

The results of researching the speed of increasing strength of modified concrete materials in early period of hardening used for mounting underground structures are given. As a result of researching the most effective supplements like D5 and RELAMIX T-2 are determined. The composition of supplement D5 with fillers of ordinary quality and a con drafting 15 sm, it will gain high strength of 6.5 MРa in 18 hours while with RELAMIX T-2 fillers it will be 2.8 MРa. The given results were used for modeling stress strained state of ground mass and concrete fastenings of non- circular shape.

Keywords: Рassage, fastening, composition of concrete, modifier, concrete strength, young modulus, stresses

The analysis of design decisions on the construction of a retaining wall embankment intended to unload the rock mass of dump trucks in the hopper of the crusher. The stress-strain state of defense structures and the soil mass in order to select the optimal technical solutions unit retaining wall. The distribution of stresses in the concrete structures and subgrade. The application of handling screens with anchor-Injector for sustainability and strengthening the walls of the mound.

Keywords: Embankment, cladding structure, retaining wall, designing, finite elements method, subfoundation, subjecting to stress, strains