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Medium-length hole controlled blasting construction method of underground large chamber

A construction method and technology of controlled blasting, which is applied in underground chambers, earthwork drilling, mining equipment, etc., can solve problems such as difficult safety management, poor working conditions, and low efficiency, so as to reduce the difficulty of roof management and improve construction safety , the effect of improving work efficiency

Inactive Publication Date: 2019-02-12
临沂会宝岭铁矿有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

Due to the above-mentioned characteristics of the cavern, the traditional cavern construction method generally has the characteristics of difficult access to large equipment, high labor intensity, low efficiency, poor working conditions, and difficult safety management.

Method used

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  • Medium-length hole controlled blasting construction method of underground large chamber
  • Medium-length hole controlled blasting construction method of underground large chamber
  • Medium-length hole controlled blasting construction method of underground large chamber

Examples

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Embodiment

[0047] Taking the horizontal crushing chamber at -480 meters in an iron mine as an example, the chamber is 13 meters long, 8 meters wide, and 11 meters high. According to the size characteristics of the chamber, such as Figure 1-Figure 3 As shown, the construction method of deep hole controlled blasting in the large underground chamber is applied, including:

[0048] Step S1: Determine that the length of the large chamber is 13 meters, the width is 8 meters, and the height is 11 meters. The height of the arching line of the vault of the large chamber is 1.4 meters. The amount of slag and rock on the vault of the chamber, and the height of the wellhead for cutting the patio is determined according to the height of the large chamber;

[0049] Step S2: Construct the bottom roadway at the bottom of the large chamber. The bottom roadway was originally used for bottom excavation during mining, and here it is used for the roadway excavated at the bottom of the large chamber. The con...

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Abstract

The invention discloses a medium-length hole controlled blasting construction method of a underground large chamber. The medium-length hole controlled blasting construction method comprises the following steps that the size of the large chamber is determined; undercutting roadway construction is conducted; chamber expansion brushing and drilling are conducted; courtyard cutting construction is conducted; upward medium-length hole construction is conducted; explosive is mounted in the medium-length hole; medium-length hole blasting is conducted; deslag is conducted; and whitewashing and supporting are conducted, and the large chamber is formed. The medium-length hole controlled blasting technology is adopted, blasting efficiency is greatly improved, the method of early centralized drillingand later unified blasting is adopted, the circulation of drilling-blasting-deslag-drilling is not required to be conducted frequently by workers, and therefore working efficiency is improved. Compared with a traditional chamber layered construction method, the cost of the method is reduced by half, construction efficiency is doubled, the construction period is shortened by half, security is greatly improved, and safety benefits are obvious.

Description

technical field [0001] The invention relates to a construction method for deep hole controlled blasting in a large underground chamber, and belongs to the engineering construction field of large underground chambers in non-coal mines. Background technique [0002] The underground chamber is a roadway with a large cross-section and a short length. Its function is to install various equipment and machines, store materials and tools, or for other special purposes. Compared with the roadway, the chamber has the following characteristics: [0003] The section of the chamber is large and short, and it is difficult for large construction machinery to enter the working face for construction; [0004] The chamber is often connected with other chambers, roadways, and well shafts. In addition, some chambers have complex structures, so their stress state is not easy to accurately analyze, and construction is difficult. When the stability of the surrounding rock is poor, construction sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D13/02
Inventor 邵昌友张纪堂刘文华历波王正英翟利军郭同晓司书波徐新海李保健王胜军胡贵发石绍飞石帅曹书沧李春鹏孙旭如孟亚辉
Owner 临沂会宝岭铁矿有限公司
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