An intelligent hole-arrangement method for tunnel blasting

A technology for tunneling and hole layout, applied in blasting and other directions, can solve problems such as increasing the difficulty and cost of support construction, insufficient blasting mechanism, and inability to efficiently break rocks, etc., to achieve easy operation and loading, reduce disturbance, and reduce usage. Effect

Active Publication Date: 2022-07-05
NANJING INST OF RAILWAY TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current research on the mechanism of blasting is still not deep enough, and the selection of design parameters in the blasting design cannot be given an accurate theoretical calculation method. Generally, the design parameters are based on experience or engineering analogy. When using traditional blasting methods, on the one hand It may cause the dissipation of detonation energy, which cannot efficiently and economically break rocks. On the other hand, detonation energy overflows, resulting in excessive rock fragmentation, which increases the difficulty and cost of support construction and reduces economic benefits.

Method used

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  • An intelligent hole-arrangement method for tunnel blasting
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  • An intelligent hole-arrangement method for tunnel blasting

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Effect test

Embodiment 1

[0033] like figure 1 As shown in the figure, an intelligent hole-arrangement method for tunnel blasting includes the following steps:

[0034] (1) The peripheral eye 1 and the positioning eye 11 are punched, and the positioning eye 11 is located at the center of the centroid of the excavation surface. Specifically, the criss-cross method can be used for positioning;

[0035] (2) Next, the peripheral eye 1 and the positioning eye 11 are blasted. For the peripheral eye 1, the blasting charge according to the smooth surface adopts an uncoupled charge structure; Blasting can effectively form rock cracks 5 around the positioning hole 11, which is used for the layout of the back cutting hole 4 and the auxiliary hole 3; the hole diameter of the positioning hole 11 is about 2 to 3 times that of the surrounding hole 1, depending on the nature of the rock mass. Make corresponding adjustments; when blasting, blast the peripheral eye 1 first, and then blast the positioning eye 11;

[00...

Embodiment 2

[0041] like Figure 4 As shown, it is basically the same as Embodiment 1, the difference is: when the width of the tunnel is too wide or the height is too high, when the blasting design is carried out, the tunnel plane is divided into different divided plane blocks 12, and each divided plane block 12 All can be regarded as a separate tunnel blasting excavation surface, the peripheral eyes are arranged according to the largest outer ring, and the positioning eyes 11 are arranged according to the particle centers of the divided face blocks 12 . When blasting, the peripheral eye 1 is blasted first, and the positioning eye 11 is blasted in the order from top to bottom. For the upper positioning eye 11, the blasting of the lower positioning eye 11 is equivalent to forming an empty surface. For different divided surface blocks 12 The connecting area of ​​12 can form the expansion crack 5 well, and the layout of the undercut eye 4 and the auxiliary eye 3 is basically the same as that...

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Abstract

The invention discloses an intelligent hole layout method for tunnel blasting. Peripheral eye is blasted by smooth surface and adopts uncoupled charge structure, and peripheral eye is blasted first; the positioning eye is located at the center of the excavation surface particle, and the focused water pressure blasting device is used; after the positioning eye is blasted, according to the crack development The positioning device is used to determine the position of the undercut hole, and the auxiliary eye position is determined in combination with the calculation method, and then the undercut hole is blasted, and finally the auxiliary eye is blasted. The invention locates the position of the blast hole through the crack development direction, utilizes the detonation energy of the explosive to the greatest extent, and at the same time ensures the smoothness of the overall contour after the peripheral eye is detonated, greatly reduces the amount of explosive used, and reduces the use and cost of economic costs. The disturbance of the blasting impact to the surrounding rock mass makes the overall blasting effect safe and stable.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to an intelligent hole-distribution method for tunnel blasting. Background technique [0002] The blasting construction of the tunnel face is mainly to blast the rock mass in the excavation part of the main body of the tunnel, and then arrange explosives on the design contour line of the tunnel to form a flat excavation surface. In the whole construction process of the tunnel, the quality of blasting excavation effect directly affects the progress of subsequent types of work. For example, if the tunnel excavation is too large, the support cavity will be caused, the under-excavation will lead to insufficient lining thickness, and the uneven contour line will lead to the uneven surface of the initial lining. , the crushed stone is too large to affect the transportation efficiency. Therefore, tunnel blasting technology plays a decisive role in tunnel construction progress,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D1/00F42D3/04
CPCF42D1/00F42D3/04
Inventor 单鹏李润璞王霜
Owner NANJING INST OF RAILWAY TECH
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