Rapid construction smooth blasting method for half-section micro-step

A technology of smooth blasting and micro-steps, which is applied in blasting, drilling equipment and methods, earthwork drilling and mining, etc. It can solve problems such as the reduction of rock strength and elastic modulus, the damage of retained rock mass, and the increase in construction costs, so as to reduce the Effects of vibration and damage, reduction of over- and under-excavation degree, and construction cost reduction
CN112483093AInactive Publication Date: 2021-03-12ι«˜ε†›
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ι«˜ε†›
Publication Date
2021-03-12
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to the technical field of tunnel engineering, and discloses a rapid construction smooth blasting method for a half-section micro-step. The rapid construction smooth blasting method comprises the following steps that a constructor formulates an excavation scheme according to surrounding rock conditions, and peripheral holes and auxiliary holes are formed by using an excavationdrilling trolley according to the excavation scheme. According to the rapid construction smooth blasting method for the half-section micro-step, multiple groups of slotting holes are formed, wedge-shaped slotting, multiple wedge-shaped slotting or straight hole layered slotting or spiral slotting is adopted for the slotting holes, and under the condition that the number of detonator sections is enough, part of rock mass at the slotting part should be blasted, so that slotting is easy to take out, the slotting effect can be guaranteed, the single-section dosage of slotting can be reduced, andthe vibration reduction effect can also be guaranteed; and by the adoption of the non-electric millisecond-level or semi-non-electric millimeter-level delay detonators and the detonating cords, the time difference requirement, namely the shock absorption requirement, can be met, meanwhile, operation is convenient, and stability is high.
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Description

technical field

[0001] The invention relates to the technical field of tunnel engineering, in particular to a smooth surface blasting method for rapid construction of half-section micro-steps. Background technique

[0002] A tunnel is a building built underground or underwater or in a mountain, laying a railway or building a road for the passage of motor vehicles. According to its location, it can be divided into three categories: mountain tunnels, underwater tunnels and urban tunnels. In order to shorten the distance and avoid large ramps, it is called a mountain tunnel that passes under mountains or hills; in order to cross rivers or straits, it is called an underwater tunnel that passes under a river or under the sea; in order to meet the needs of railways passing through large cities, it is called a tunnel. Those that pass underground are called urban tunnels. Among these three types of tunnels, mountain tunnels are the most constructed.

[0003] In the prior art, the...

Claims

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