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Millisecond blasting vibration and flying rock control method

A technology of differential blasting and control method, which is applied in blasting and other directions, and can solve problems such as difficult control of rock throwing distance and blasting width, impact of blasting vibration on flying rocks, and low blasting safety, so as to improve blasting effect and reduce blasting width , good blasting effect

Inactive Publication Date: 2019-12-13
CHINA RAILWAY SEVENTH GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the traditional differential blasting technology, it is difficult to control the throwing distance of rocks and the blasting width, the impact of blasting vibration and the hazards of flying rocks are relatively large, and the blasting safety is low

Method used

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  • Millisecond blasting vibration and flying rock control method
  • Millisecond blasting vibration and flying rock control method
  • Millisecond blasting vibration and flying rock control method

Examples

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specific Embodiment

[0049] Specific embodiment: Taking the general contracting project of a shanty town renovation (urban village) project as an example, the surrounding environment of the project is complex: the poultry wholesale market is to the east, and the community and roads are to the south. The planned land area of ​​the project is 58,200 square meters, with a total construction area of ​​413,700 square meters, including 265,600 square meters above ground and 148,100 square meters underground. On the ground are six 33-story high-rise residential buildings, a 6-story commercial and office building, and a 15-story hotel and office building. The differential blasting vibration and flying stone control method specifically includes the following steps:

[0050] 1. Selection of blasting equipment

[0051] (1) Selection of explosive types

[0052] The type of explosive has a direct impact on the blasting vibration velocity of the explosive. According to the geological and hydrological conditi...

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Abstract

The invention discloses a millisecond blasting vibration and flying rock control method. The millisecond blasting vibration and flying rock control method includes the following steps of 1), design ofa blasting scheme; 2), hole stepping and drilling; 3), powder charging; and 4), blasting, wherein detonator blasting is delayed through milliseconds, partition blasting is adopted in a blasting sequence, a first region close to an external building is blasted firstly, then a second region away from the external building is blasted, according to the blasting sequence of each region, cutholes are blasted, tunneling holes are blasted, then periphery holes are blasted, finally, bottom holes are blasted, the delay time of the cutholes is controlled to be set at 60 milliseconds-100 milliseconds, the delay time of the tunneling holes is set at 600 milliseconds-750 milliseconds, and the delay time of the periphery holes is set at 950 milliseconds-1,150 milliseconds. The control method is good inblasting effect, high in precision and good in safety.

Description

technical field [0001] The invention relates to the technical field of engineering blasting, and more specifically, the invention relates to a method for controlling differential blasting vibration and flying rocks. Background technique [0002] Micro-differential blasting technology, also known as millisecond blasting technology, is a delayed blasting with a delay time interval of several milliseconds to tens of milliseconds. The blasting time interval of adjacent sections of blasting holes is extremely short, which can make the energy fields generated by each blasting hole interact with each other, and can effectively improve the blasting effect. Due to the small time difference of each section of the millisecond series detonator, the first explosive has caused certain damage in the rock mass, forming a crack and free surface with a certain width, which provides favorable blasting conditions for the latter explosive. However, in the traditional differential blasting techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D3/04
CPCF42D1/00F42D3/04
Inventor 黄克双张文格袁义华郭炜欣樊小宾李钧周张健袁金安马骜李济辰
Owner CHINA RAILWAY SEVENTH GRP CO LTD
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