Method for blasting shallow section of modernization railway tunnel

A technology of tunnel and shallow burial, which is applied in blasting and other directions, and can solve problems such as the inability to ensure that the roof and other buildings of shallow buried tunnels are not damaged, and it is difficult to grasp the impact of blasting

Active Publication Date: 2014-03-05
CHINA RAILWAY 23RD CONSTR BUREAU LTD
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AI Technical Summary

Problems solved by technology

[0002] The existing tunnel blasting technology is a common blasting technology, but when it is applied to the shallow buried section of the tunnel, it is difficult to grasp the impact of the blasting, and it cannot guarantee that the roof and other buildings of the shallow buried tunnel will not be damaged.

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  • Method for blasting shallow section of modernization railway tunnel
  • Method for blasting shallow section of modernization railway tunnel
  • Method for blasting shallow section of modernization railway tunnel

Examples

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Embodiment 1

[0024] This blasting method was used in the shallow buried section of the T9 Tunnel of the Georgian Modern Railway. The actual construction proved that the blasting method can greatly reduce the blasting impact, meet the requirements of the blasting code, and create conditions for the smooth construction of the longest single-track tunnel of the Georgian Modernization Project Control Engineering. At the same time, it has demonstrated the level of tunnel construction technology to international friends, and has been recognized by the owners and supervisors, creating tens of millions of benefits for the company; therefore, here is an example of the shallow buried section of the T9 tunnel of the Georgian modern railway. A blasting method for a shallow buried section of a tunnel, the steps of which are as follows:

[0025] Step 1. Evaluate the houses around the blast site;

[0026] The west entrance of the tunnel is located in the middle and low mountainous area, with large terrai...

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Abstract

The invention relates to the field of tunnel blasting, in particular to a method for blasting a shallow section of a modernization railway tunnel. The method includes the steps that houses around a blasting position are firstly assessed; arrangement positions of shot holes are then determined, and a full fracture surface is divided into a left blasting area and a right blasting area; charge structures of all the shot holes are determined; time for delay initiation, shot hole charge quantity and explosive kinds are determined; an underholing method, the distance between periphery holes and the least resistance line of the periphery holes are selected according to the characteristics of surrounding rock on site, the various shot holes are machined on the full fracture face according to the data determined in the step two, and explosive is installed according to the data determined in the step three; blasting is performed according to the blasting area partition sequence of cutholes-satellite holes-periphery holes-bottom plate holes, the satellite holes perform layer-by-layer blasting from inside to outside, and same-section millisecond blasting caps are adopted for initiation of the periphery holes. The purpose is to provide the method for blasting the shallow section of the modernization railway tunnel, wherein blasting influence can be reduced stably when the shallow section of the tunnel is blasted.

Description

technical field [0001] The invention relates to the field of tunnel blasting, in particular to a blasting method for a shallow buried section of a modern railway tunnel. Background technique [0002] The existing tunnel blasting technology is a universal blasting technology, but when it is applied to the shallow buried section of the tunnel, it is difficult to grasp the impact of the blasting, and it cannot guarantee that the roof and other buildings of the shallow buried tunnel will not be damaged. Contents of the invention [0003] In view of the problems existing in the prior art, the object of the present invention is to provide a blasting method for the shallow buried section of a modern railway tunnel which can stably reduce the impact of blasting during the blasting of the shallow buried section of the tunnel. [0004] In order to achieve the above object, the technical scheme adopted in the present invention is: [0005] A blasting method for a shallow buried sect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D3/04F42D1/00
Inventor 王岑田宝华彭继安陈幼林王红刘延龙霍莉
Owner CHINA RAILWAY 23RD CONSTR BUREAU LTD
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