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A large-diameter column implantation method suitable for the treatment of goafs with thick and hard roofs or limestone caves

A technology for thick and hard roofs and goafs, applied in drilling equipment and methods, mining equipment, earthwork drilling and mining, etc., can solve problems such as construction inconvenience, achieve the effects of reducing material consumption, saving costs, and good practical application value

Active Publication Date: 2022-04-19
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Application Information

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Problems solved by technology

[0003] In order to ensure the safety of the structures above the goaf and solve the inconvenience of construction in the goaf, the purpose of the present invention is to provide a large-diameter column suitable for the treatment of the goaf (or limestone cave) with thick and hard roofs. Implantation method

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  • A large-diameter column implantation method suitable for the treatment of goafs with thick and hard roofs or limestone caves
  • A large-diameter column implantation method suitable for the treatment of goafs with thick and hard roofs or limestone caves
  • A large-diameter column implantation method suitable for the treatment of goafs with thick and hard roofs or limestone caves

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Embodiment Construction

[0032] In order to further illustrate the technical details of the present invention, preferred implementation examples of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] On the basis of ensuring ground deformation requirements, operators do not enter the gob area and the construction period is short, the effect is good, and the cost is low. The scheme of the present invention uses a large-scale rotary excavator to work on the ground, and the lower steel casing forms a formwork in the cavity, and the implanted reinforced concrete piles will form a whole with the hard thick roof and floor, so as to reduce the span of the goaf and increase the goaf stability. The technology of the present invention is specifically to use modern bored pile casing drilling technology to implant a certain number of large-diameter reinforced concrete columns in the goaf area (in view of the current performance of drilling rigs for drill...

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Abstract

The invention discloses a large-diameter column implantation method suitable for the treatment of goafs (or limestone caves) with thick and hard roofs. When a single column is implanted, segmental drilling and casing boot drilling methods are used. , drill into the hollow floor to complete the bedrock 2D, after the drilling is completed, the expensive professional drilling casings and pipe boots in the hole are extracted in sections and replaced with cheaper ordinary steel casings for full-hole casing sweeping drilling to The elevation of the bottom of the drilled hole; then cut off the ordinary steel casing above the hollow roof. Put a reinforcement cage into the hole and pour concrete to 5D above the roof to form a large-diameter reinforced concrete column. By implanting a certain number of large-diameter reinforced concrete columns in the goaf (or limestone cave) area, using the embedded effect between the top of the reinforced concrete columns and the rock mass, the reinforced concrete columns can bear a certain load of the overlying rock to reduce the impact on the roof. In this way, a brand-new support system is formed, which uses the implantation of large-diameter columns to enhance the stability of the goaf (or limestone cave).

Description

technical field [0001] The invention belongs to the technical field of geological disaster treatment, and specifically relates to a large-diameter column implantation method suitable for the treatment of goafs (or limestone caves) with thick and hard roofs, and is suitable for artificially difficult access to mining areas with thick and hard roofs. Governance of empty areas (or limestone caves). Background technique [0002] With the development of urbanization in our country, the surrounding areas of the city are very expensive, and many important projects need to be constructed on the goaf, and the demand for reinforcement and treatment of the gob is increasingly strong. There are mainly grouting method and non-grouting method in goaf cavity treatment. The traditional grouting method needs to inject a large amount of grout material, which is time-consuming and material-consuming; the traditional non-grouting method (such as: dry laying method and mortar laying method) oft...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21B7/00E21B3/00E21B21/00E02D3/12
CPCE21D11/105E21B7/00E21B3/00E21B21/00E02D3/12
Inventor 郝谦武雄刘少炜魏义强郝卫国
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)