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Tunnel excavation smooth blasting method

A technology of smooth blasting and tunneling, applied in blasting and other directions, can solve the problems of complex construction process, high construction cost, high price, etc., and achieve important economic benefits, low construction cost, and easy purchase

Inactive Publication Date: 2009-02-18
SINOHYDRO BUREAU 5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the specific construction process of smooth blasting at present, one is that special photoexplosives are difficult to purchase and the price is high, and the other is that the construction process is complicated and the construction cost is high

Method used

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  • Tunnel excavation smooth blasting method
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Embodiment Construction

[0023] The present invention will be explained in more detail below in conjunction with the accompanying drawings.

[0024] Such as figure 1 , a smooth surface blasting method for tunnel excavation, the method adopts interval charges in the hole, and uses the phenomenon of sacrificial explosion between different charge rolls to carry out sequential blasting,

[0025] First, drill a hole at the blasting site and measure and record the diameter D of the hole and the depth L of the hole.

[0026] Then, in tunnel blasting, hole blowing must be carried out after the hole is drilled and before the charge is charged, so as to prevent the stone slag at the bottom of the hole from affecting the blast transmission.

[0027] Before charging, it is necessary to analyze the properties of the rock mass, select the appropriate drug volume 3 according to whether the rock mass is homogeneous or heterogeneous rock mass, record the length d2 of the selected drug volume 3, and set the air interv...

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Abstract

The invention relates to a new method for tunnel excavation smooth blasting, which makes use of the common emulsion explosive instead of dedicated smooth explosive and detonating cords, and fills the explosive at interval in the holes and utilizes the sympathetic detonation phenomenon among different explosive scrolls to transfer the detonation in turn to achieve the goals. Compared with the traditional method, the materials required in the invention can be easily purchased, and the costs can be significantly reduced.

Description

technical field [0001] The invention relates to a smooth blasting technology for tunnel excavation, in particular to a new smooth blasting technology that does not use special photoexplosives and detonating cords. Background technique [0002] Smooth surface blasting is a controlled blasting technology that achieves regular wall surface smoothness after blasting and conforms to design requirements through correct selection of blasting parameters and reasonable construction methods. Tunnel fully disconnected digging smooth surface blasting is a construction method that uses smooth blasting technology to excavate the entire section of the tunnel at one time. Compared with the traditional blasting method, its most notable advantage is that it can effectively control the blasting effect of peripheral eye explosives, thereby reducing the disturbance to the surrounding rock, maintaining the stability of the surrounding rock, and ensuring construction safety. Digging, improve proj...

Claims

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Application Information

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IPC IPC(8): F42D3/00
Inventor 杨玉银梁涛于永
Owner SINOHYDRO BUREAU 5
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