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Charging method for solid carbon dioxide in fracturing hole for non-blasting excavation rock

A solid carbon dioxide, non-blasting technology, which is applied in blasting construction and rock fracturing fields, can solve the problem of small amount of rock breaking in a single time, and achieve the effects of improving rock breaking efficiency, optimizing charge structure, and increasing step height

Inactive Publication Date: 2018-05-04
中铁(广州)投资发展有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the current solid carbon dioxide charging method has the problem of a small amount of rock breaking per time.

Method used

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  • Charging method for solid carbon dioxide in fracturing hole for non-blasting excavation rock
  • Charging method for solid carbon dioxide in fracturing hole for non-blasting excavation rock
  • Charging method for solid carbon dioxide in fracturing hole for non-blasting excavation rock

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Embodiment Construction

[0027] The invention provides a charging method for solid carbon dioxide in a fracturing hole of a rock excavated by non-blasting. The invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.

[0028] The charging method for solid carbon dioxide in the fracturing hole of rock excavated by non-blasting provided by the present invention comprises the following steps:

[0029] Step S1: Determine the energy required for complete gasification of single-stage solid carbon dioxide on site and reach the level of rock breaking,

[0030]

[0031] In the formula, E car : Energy kJ when solid carbon dioxide explodes,

[0032] p: the instantaneous pressure Mpa after the explosion of solid carbon dioxide,

[0033] K: thermal insulation coefficient of carbon dioxide gas,

[0034] V car : volume of solid carbon dioxide;

[0035] Step S2: determine the amount of catalyst, including the following sub-steps:

[0036] Step S21, make ...

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Abstract

The invention discloses a charging method for solid-state carbon dioxide in fracturing hole for non-blasting excavation rock. The charging method comprises the following steps that S1, complete gasification of a single solid-state carbon dioxide in site is determined to reach the energy of rock breaking level; S2, the catalyst dosage is determined; and S3, the single solid-state carbon dioxide andthe catalyst are put at certain distance in an opening of the rock mass, and charging is carried out using a sectionalized charging way. An analogy method is adopted, the completely vaporized energyof the solid-state carbon dioxide is equivalent to the standard TNT equivalent of blasting, and then a selection is carried out by parameter choice of the sectionalized charging of the existing blasting; and the steps are clear, the operation is possible, the structure of solid-state carbon dioxide rock-breaking charging is optimized, step height is increased, the limitations of existing chargingmethod is broke, the amount of single rock breaking can be effectively increased, and the rock breaking efficiency is improved.

Description

technical field [0001] The invention relates to the technical fields of blasting construction and rock fracturing, in particular to a charging method for solid carbon dioxide in a fracturing hole of a rock excavated by non-blasting. Background technique [0002] The solid carbon dioxide rock fracturing method is frequently used in the excavation construction of large urban core areas. Initially, liquid carbon dioxide rock breaking devices were often used in the industry to break rocks. However, due to the complexity of supporting equipment, inconvenient transportation of rock breaking pipes, and large borehole diameter Not promoted. [0003] At present, a new idea of ​​using solid carbon dioxide instead of liquid carbon dioxide has been proposed. Solid carbon dioxide is commonly known as "dry ice", which is easy to store and convenient to transport. After thermal expansion, the volume expansion rate is larger than that of liquid carbon dioxide, and its potential rock breaki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C37/14F42D1/00F42D3/04
CPCE21C37/14F42D1/00F42D3/04
Inventor 金德成肖清华杨林浩范恒秀高海宏谭小春钟波郭桂喜陈建庭邱瑞成艾健森
Owner 中铁(广州)投资发展有限公司
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