Blasting device capable of reducing deep foundation pit stonework blasting boulder yield

A technology of pit stonework and large block rate, applied in blasting and other directions, can solve the problems of increased excavation loss, restricting construction progress, increasing secondary crushing cost, etc., and achieves the effect of increasing unit consumption and reducing large block rate.

Pending Publication Date: 2022-03-01
广州铁路投资建设集团有限公司 +2
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Problems solved by technology

[0002] The large block rate after blasting is the main index to measure the blasting effect. If the large block rate is too high, it is difficult to transport by grab bucket, and it needs to be broken again by re-blasting machine, which leads to low cleaning efficiency and restricts the construction progress. The cost of secondary crushing is increased, and the blasting of large blocks also increases the loss of excavation

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  • Blasting device capable of reducing deep foundation pit stonework blasting boulder yield
  • Blasting device capable of reducing deep foundation pit stonework blasting boulder yield
  • Blasting device capable of reducing deep foundation pit stonework blasting boulder yield

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Embodiment Construction

[0017] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Wherein, similar elements in different implementations adopt associated similar element numbers. In the following implementation manners, many details are described for better understanding of the present application. However, those skilled in the art can readily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the application are not shown or described in the description, this is to avoid the core part of the application being overwhelmed by too many descriptions, and for those skilled in the art, it is necessary to describe these operations in detail Relevant operations are not necessary, and they can fully understand the relevant operations according to the description in the specification and genera...

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Abstract

The invention discloses a blasting device capable of reducing the boulder rate of deep foundation pit stonework blasting, which comprises a plurality of rows of blasting hole groups arranged in a pre-blasting area, the blasting hole groups in the plurality of rows of blasting hole groups are parallel to each other, and each blasting hole group comprises a plurality of blasting holes; each blasting unit is arranged in the corresponding blasting hole, each blasting unit comprises a detonating unit and a charging structure, and each charging structure sequentially comprises a blocking section, a first charging section, a spacing section and a second charging section from top to bottom; the first charging section and the second charging section are both connected with the detonating unit, and the unit consumption q of the first charging section and the unit consumption q of the second charging section are both 0.38 kg / m < 3 >-0.42 kg / m < 3 >. The blasting hole filling section is filled with the first charging section and the second charging section in the blasting unit, and unit consumption is properly increased, so that blasting stress is concentrated, and the boulder rate can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of blasting structures, in particular to a blasting device capable of reducing the large block rate of rockwork blasting in deep foundation pits. Background technique [0002] The large block rate after blasting is the main index to measure the blasting effect. If the large block rate is too high, it is difficult to transport by grab bucket, and it needs to be broken again by re-blasting machine, which leads to low cleaning efficiency and restricts the construction progress. The cost of secondary crushing is increased, and the blasting of large blocks also increases the loss of excavation. [0003] After the investigation of the blasted rock mass, the distribution of the large block rate is mainly concentrated in the filling section of the blast hole, which is less affected by the blasting stress wave because there is no charge. relation. Contents of the invention [0004] The technical problem mainly so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D1/08
CPCF42D1/00F42D1/08
Inventor 贺婷李伟亮焦长洲郑烽何文乐徐冠玉刘自兵杨雁彬陈钰博尹兴龙
Owner 广州铁路投资建设集团有限公司
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