Hole-outside micro-differential networked construction method for reducing blasting vibration in tunnel excavation

Abstract

The invention discloses a hole-outside micro-differential networked construction method for reducing blasting vibration in tunnel excavation. The method comprises the following steps of arranging hole-inside detonators and hole-outside detonators according to blast hole parameters and networking parameters; and detonating detonator connected in series in any two adjacent sections from a pluralityof sections, wherein each section comprises a plurality of blast holes and a plurality of hole-inside detonators, and each blast hole from the plurality of blast holes is connected with a first end ofone hole-inside detonator in the plurality of hole-inside detonators, and a second end of each hole-inside detonator from the plurality of hole-inside detonators comprised by each section is connected in series through a hole-outside detonator. According to the method, the problem of unstable blasting in adopting a hole-inside micro-differential networked construction method and a hole inside-outside micro-differential networked construction method can be solved.

Description

technical field [0001] The invention relates to the field of blasting construction of underground excavation tunnels by mining method, in particular to a construction method of micro-differential networking outside the hole for vibration reduction blasting of underground excavation tunnels. Background technique [0002] At present, the underground excavation tunnels of urban subways are typical examples. The surrounding environment of underground excavation blasting projects is becoming more and more complex, and blasting vibration and other blasting safety risks are paid more and more attention. Vibration-reducing blasting is also a fundamental factor that restricts construction progress and construction safety. In the environment of underground excavation blasting, it is very necessary to study vibration reduction blasting construction. [0003] In the existing technology, the smooth blasting method of the traditional mining method generally adopts the differential method ...

AI Technical Summary

Problems solved by technology

[0006] When dealing with vibration-reducing blasting, the disadvantage of the limited number of conventional non-electric millisecond detonators is more prominent. In order to control the vibration velocity, it is necessary to reduce the amount of single-stage priming charge correspondingly, and the reduction of single-stage priming charge will lead to poor single-stage blasting effect. One-time blasting is often difficult to meet the construction requirements, and it needs to be solved by multiple blasting methods. If the hole differential network construction method is adopted, the debris generated by the previous blasting will affect the subsequent blasting line, and the blasting stability is poor. At the same time, the construction method of differential network, the construction process is extremely complicated, and the problem of poor blasting stability still exists, which has a negative impact on factors such as safety, construction period and benefit.

[0007] Aiming at the problem of unstable blasting in the construction method of micro-differential network in the hole and the simultaneous micro-differential network construction method inside and outside the hole in the existing technology, no effective solution has been proposed so far.

Images