Method for supporting steel grating

A technology of steel grid and steel wire mesh, which is applied in earthwork drilling, wellbore lining, tunnel lining, etc., and can solve the problem of insufficient overall strength of anchor rods and steel wire mesh

Inactive Publication Date: 2010-05-19
CHINA HUAYE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] However, if the above-mentioned support method is adopted, because the overall strength of the above-mentioned anchor rod and steel wire mesh is not high enough, its support capacity will have certain deficiencies in the case of a large section. After long-term construction practice, it is found that it is proposed A new steel grid support method using steel grid as support material can fully ensure the safety of construction

Method used

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  • Method for supporting steel grating
  • Method for supporting steel grating
  • Method for supporting steel grating

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Embodiment Construction

[0015] When excavating roadways and large chambers, such as crushing chambers, water pump rooms, central substations, etc., if you encounter general broken zones (surrounding rocks are broken but can be stable for a period of time) and faults, support measures are required. To ensure the construction safety in the broken zone area. Below, the steel grid support method involved in the present invention will be described in detail in conjunction with the drawings and specific embodiments.

[0016] figure 1 It is a flow chart representing the steel grid support method involved in the present invention. Here, refer to figure 1 Describe in detail the steps of the steel grid support method.

[0017] First, step 101 of controlled blasting is performed. That is, when excavating a large chamber, due to the release of the surrounding rock stress and the impact of previous blasting vibration and other factors, accidents such as collapse are very easy to occur near the broken zone or f...

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Abstract

The invention relates to a method for supporting a steel grating, which comprises the following steps: controlled blasting: when drilling a blast hole, compacting the peripheral holes and reducing the explosive load; temporary shotcrete support: shotcreting on the cross section of the constructed object to form a temporary shotcrete support; anchor stock installation: drilling the anchor stock holes in the constructed object vertically and horizontally, and inserting the anchor stock into the hole; steel fabric sheet installation: fixing a steel fabric sheet on the installed anchor stock; steel grating installation: fixing a steel grating on the anchor stock; and final shotcrete support: shotcreting to complete the entire steel grating support. The supporting method can completely ensure the safety of the downhole excavation construction.

Description

technical field [0001] The invention relates to a support method using a steel grid, which belongs to the field of mine construction. Background technique [0002] When excavating roadways and large chambers, broken geological zones or faults are often encountered. Broken geological zones refer to unfavorable geological conditions that are unfavorable to tunnel construction, such as loose strata, karst, faults, soft soil sections, soil and rock, and dissolved cavities. environment, under such geological conditions, although the surrounding rock can be temporarily stable for a period of time, if the surrounding rock is exposed to the air for a long time, accidents such as landslides often occur, especially when excavating large chambers, such as water pump rooms, central In the substation, due to the large cross-section excavated, in the early stage of excavation of the large-section chamber, due to the release of surrounding rock stress and the impact of blasting vibration, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/12E21D20/00
Inventor 江定洪刘东申赵和平
Owner CHINA HUAYE GROUP
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