Method for implementing full-face smooth blasting construction by using digital detonators

A technology of smooth blasting and construction methods, applied in blasting and other directions, can solve problems such as poor blasting quality, and achieve the effects of increasing cyclic footage, obvious blasting vibration control, and significant social and economic benefits.

Inactive Publication Date: 2012-01-04
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0003] In order to solve the above technical problems, the present invention provides a construction method for full-sect

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  • Method for implementing full-face smooth blasting construction by using digital detonators
  • Method for implementing full-face smooth blasting construction by using digital detonators
  • Method for implementing full-face smooth blasting construction by using digital detonators

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[0027] In 2010, the excavation and blasting of tunnels in the XX area was carried out using the following plan: (1) Cycle footage: set according to geological conditions, for example, the blast footage per cycle is 1.5-2.5m, with an average footage of 2.0m. (2) Blasting equipment: No. 2 rock emulsion explosives are used as explosives, and "Longxin No. 1" digital detonator and iridium bowl initiation system are selected. (3) Cutting method: V-shaped cutting is adopted, the depth of the cutting blasthole is 3.0-3.3m, and the depth of other blastholes is 2.7-2.8m. The detonating cord is 3m. (4) Charge structure: the blast hole diameter is 42cm, the charge diameter is 25cm, the uncoupled charge structure is adopted, the peripheral eyes all adopt the form of spaced charges, and the uncoupled ratio n=1.68. (5) Delay time design: The delay time of the digital detonator is 693ms, the time interval of the micro-difference blasting of the slot eye is 3ms, the initiation time interval o...

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Abstract

The invention relates to a method for implementing a full-face smooth blasting construction by using digital detonators. The method comprises the following steps: (1) designing a blasting construction plan; (2) carrying out trial blasting; (3) numbering digital detonators; (4) setting delay blasting times for the digital detonators; (5) installing the digital detonators; (6) carrying out web connection; and (7) carrying out a digital detonator detonation process. Compared with a common blasting method, by using the method provided by the invention, the blasting fracture is increased by 40%, and the smooth effect is increased by 30%, the full-face blasting can be performed, and the circulation footage is increased; a blasting vibration control effect is obvious; and the construction cost is higher than that of the construction using a drilling and blasting method, but compared with other methods, the construction cost advantage is obvious, therefore, the method provided by the invention has remarkable social and economic benefits.

Description

technical field [0001] The invention relates to a construction method for realizing full-section smooth surface blasting by using a digital detonator. Background technique [0002] With the acceleration of urban infrastructure construction in our country, the development and utilization of urban underground space has been increasing, especially the urban rail transit system, as the urban infrastructure, has been greatly developed. The drilling and blasting method is currently the main method in the construction of urban rail transit in hard rock formations; in the construction of tunnel excavation, smooth blasting is an important technical content in blasting engineering, and the quality of its effect has a great impact on the excavation speed, excavation efficiency and excavation cost. have a greater impact. The role of smooth blasting is to form a cavity, create a free surface and rock breaking and throwing space for the blast hole after blasting, so as to provide good bl...

Claims

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Application Information

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IPC IPC(8): F42D1/00F42D3/00
Inventor 黄明利谭忠盛阮清林洪开荣孟小伟霍亚超关岩鹏
Owner BEIJING JIAOTONG UNIV
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