Lattice compound shaft structure and construction method

Abstract

The invention provides a lattice compound shaft structure and a construction method and relates to a coal mining technology. The lattice compound shaft structure comprises outer side shafts and an inner side shaft, the inner side shaft is arranged in the outer side shafts, and the outer wall of the inner side shaft is integrally connected with the inner walls of the outer side shafts through concrete. Each outer side shaft is composed of two first shaft walls and two second shaft walls which are sequentially surrounded and are arranged alternately. Each first shaft wall comprises a first steelmixed layer and a heat insulation plate arranged on the outer wall of the first steel mixed layer. Each second shaft wall comprises a second steel mixed layer and a heat insulation plate arranged onthe outer wall of the second steel mixed layer. Each of the first steel mixed layers and the second steel mixed layers comprises a structural steel framework and concrete poured to the periphery of the structural steel framework, the two ends of the interior of each first steel mixed layer contract inwards to form a limiting groove, and the two ends of the interior of each second steel mixed layerextend outwards to form a limiting block matched with the corresponding limiting groove. By means of the structure, the defects existing in an existing structure are overcome, damage caused by the earthquake action is effectively prevented, and the earthquake prevention and disaster reduction capability of coal mine shafts in China is improved.

Description

technical field [0001] The invention relates to coal mining technology, in particular to a lattice-type composite shaft structure and a construction method. Background technique [0002] With the rapid development of my country's economic construction, the demand for energy is increasing, and the problem of energy shortage is becoming more and more serious. It will take time for new energy to fully replace traditional energy. As far as my country's current energy composition is concerned, coal energy still occupies a dominant position. Therefore, building a new batch of large coal mines is an urgent task at present. [0003] However, with the depletion of shallow coal resources, excavating to the deep and building new mines in the deep surface soil will be an important problem to be solved urgently in coal mine construction. With the increase of topsoil thickness, there is a problem that the well wall design is difficult to solve. Whether it is the design of the outer well...

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Problems solved by technology

With the increase of the topsoil thickness, there is a problem that the well wall design is difficult to solve. Whether it is the design of the outer well wall or the inner well wall, when considering the frost heave pressure and the full water pressure design, the well wall thickness will be too large. Large or too high concrete strength grade

At the same time, at present, reinforced concrete is basically used as the shaft wall material for the support of shaft engineering, and steel mesh is generally bound, formwork is set up, and concrete is poured in the construction. There are problems in the construction site, such as binding steel bars, supporting formwork, and pouring concrete. In addition, with the traditional shaft wall construction technology, the initial strength of the shaft wall after pouring is relatively weak, and the strength cannot meet the design requirements. Under the repeated action of explosive loads, cracks are likely to occur, which reduces the actual strength of the shaft wall and causes hidden dangers in engineering quality.

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