Lattice Composite Shaft Structure and Construction Method

Abstract

The invention provides a lattice-type composite shaft structure and a construction method, relating to coal mining technology, comprising an outer shaft and an inner shaft, the inner shaft is arranged in the outer shaft and the outer wall and the inner wall of the outer shaft are connected as a whole through concrete; the outer shaft It is composed of two first cylinder walls and two second cylinder walls which are arranged successively and spaced apart from each other. The first cylinder wall includes a first steel-concrete layer and an insulation board arranged on the outer wall of the first steel-concrete layer. It includes the second steel-concrete layer and the insulation board arranged on the outer wall of the second steel-concrete layer. Both the first steel-concrete layer and the second steel-concrete layer include a steel frame and concrete poured around the steel frame. The inside of the first steel-concrete layer The two ends shrink inwardly to form a limiting groove, and the inner two ends of the second steel-concrete layer extend outward to form a limiting block matched with the limiting groove. The structure can improve the defects existing in the existing structure, effectively prevent the damage caused by the earthquake, and enhance the earthquake prevention and disaster reduction ability of coal mine shafts in my country.

Description

technical field [0001] The invention relates to coal mining technology, in particular to a lattice-type composite wellbore 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 major position. Therefore, building a batch of large-scale coal mines is an urgent task at present. [0003] However, with the depletion of shallow coal resources, excavation to the deep and the construction of new mines in the deep surface layer 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 wellbore design is difficult to solve. Whether it is the design of t...

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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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