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Tunnel drill hole laying method for refined blasting control

A technology for tunnels and detonating cords, applied in tunnels, blasting, mining equipment, etc., can solve problems such as large disturbances in surrounding rocks, and achieve the effects of reducing risk elimination time, shortening construction period, and enhancing action time

Active Publication Date: 2022-07-05
CHINA TIESIJU CIVIL ENG GRP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing blasting methods, the blastholes are drilled directly according to the unified construction method, and then the explosives are filled for blasting. The blasting vibration has a great disturbance to the surrounding rocks of different grades.

Method used

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  • Tunnel drill hole laying method for refined blasting control
  • Tunnel drill hole laying method for refined blasting control
  • Tunnel drill hole laying method for refined blasting control

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Embodiment Construction

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] A method for arranging tunnel drilling with fine blasting control specifically includes the following steps:

[0026] (1), see figure 1 , measure the payout, and arrange the blastholes: lay the peripheral eye 1 along the edge of the contour line of the blasted face, and the distance between the adjacent peripheral eyes 1 is 0.5 meters, located inside the peripheral eye 1 and along the contour line. , the distance between the ...

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Abstract

The invention discloses a fine blasting control tunnel drilling layout method, which comprises the following steps of: firstly, measuring, setting out and arranging shot holes, then designing a single excavation length according to the distribution of tunnel surrounding rock levels, drilling shot holes with corresponding depths according to the excavation length, and finally, according to the differences of the tunnel surrounding rock levels and the single excavation lengths, setting out the blasting holes with corresponding depths according to the different tunnel surrounding rock levels and the different single excavation lengths. Different explosive quantities are set, and finally shot hole filling is conducted. According to the method, shot holes with corresponding depths are drilled for surrounding rocks with different grades, and then the explosive filling amount and the shot hole blocking length are adjusted, so that smooth blasting of the tunnel is achieved, the tunnel surrounding rocks are protected, disturbance of blasting vibration to the surrounding rocks is reduced to the maximum extent, the tunnel blasting quality is improved, and the operation time of the procedures of tunnel drilling, deslagging, danger removal and the like is shortened.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a method for arranging a tunnel borehole with fine blasting control. Background technique [0002] The tunnels currently constructed in my country are often constructed using the drill-and-blast method. Due to its strong adaptability to geological conditions and low excavation cost, the drill-and-blast method is especially suitable for the construction of hard rock tunnels, broken rock tunnels and a large number of short tunnels. However, in the existing blasting methods, the blasthole is drilled directly according to the unified construction method, and then the blasting is carried out by filling the charge. The blasting vibration greatly disturbs the surrounding rock of different grades. SUMMARY OF THE INVENTION [0003] The technical problem to be solved by the present invention is to provide a tunnel drilling arrangement method for fine blasting control. For di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D1/10F42D3/04F42D1/18E21D9/00
CPCF42D1/00F42D1/10F42D3/04F42D1/18E21D9/006Y02E10/20
Inventor 王鑫章健王勇陈杨贾建增冯冀蒙瞿光宗吴奥宣亮张璇朱英
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD
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