Blasting construction method used before construction of mountain shortcuts above existing roads

Abstract

The invention belongs to the field of mountain blast working, and particularly relates to a blasting construction method used before construction of mountain shortcuts above existing roads. Step shallow hole blasting is adopted for mountain excavation road sections, the blasting area above the existing roads is covered with a protective net, the blasting work amount is checked according to the construction scheme, friable rock and surface soil above rock are removed, the plum blossom type hole distribution mode is adopted for blast holes, micro-delay detonation between rows is adopted for the detonation order, and the peak vibration velocity of the surface of the area with a power grid tower foundation is smaller than 5.0 cm / s. According to the method, the blasting accuracy and the direction of flying stones generated by blasting can be effectively controlled, and the blasting requirements before construction of the mountain shortcuts can be met on the basis of guaranteeing the safety of the existing roads and nearby residents.

Description

technical field [0001] The invention belongs to the field of mountain blasting construction, and in particular relates to a blasting construction method before the construction of a mountain access road above an existing road. Background technique [0002] With the further advancement of our country's infrastructure, the development and construction of mountain roads is becoming more and more important. However, many roads have been paved on or under the mountains, such as provincial roads, national roads or expressways. The traditional mountain blasting method is no longer applicable. This kind of terrain pattern, because the gravel produced by the blasting will roll down to the existing roads and nearby residential buildings in large quantities, causing serious safety incidents. Therefore, it is urgent to develop a blasting construction method before the construction of mountain access roads above existing roads, which can meet the construction needs of mountain access roa...

AI Technical Summary

Problems solved by technology

[0002] With the further advancement of our country's infrastructure construction, the development and construction of mountain roads is becoming more and more important. However, many roads have been laid on or under the mountains, such as provincial roads, national roads or expressways. The traditional mountain blasting method is no longer applicable. This kind of terrain pattern, because the gravel produced by the blasting will roll down to the existing roads and nearby residential buildings in large quantities, causing serious safety incidents

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