Head wave inhibition blasting construction method based on electronic digital detonator

Abstract

The invention discloses a head wave inhibition blasting construction method based on an electronic digital detonator, and relates to the technical field of tunnel blasting construction. By applying the digital electronic detonator precise delaying hole-by-hole detonating and inter-hole phase dislocation vibration absorption technologies, the vibration speed peak value of a protection object can bereduced by 60%, moreover, the vibration peak value occurs to a first grooving hole, through destructive interference of vibration waves of vibration absorption holes and vibration waves of the firstgrooving hole, the vibration speed peak value of the protection object is further reduced by 30%, accordingly, the vibration speed of a critical structure object is greatly decreased, the supercritical structure object or ultra-shallow buried tunnel blasting construction technology is achieved, and the head wave inhibition blasting construction method has remarkable social benefits and economic value.

Description

technical field [0001] The invention relates to the technical field of tunnel blasting construction, in particular to a first-wave suppression blasting construction method based on an electronic digital detonator. Background technique [0002] With the acceleration of urbanization in China, the traffic in large central cities is becoming more and more congested, and the construction of urban underground transportation has been continuously intensified. Many shallow buried hard rock tunnel projects have appeared in central urban areas. Due to the huge advantages in economy and efficiency, the drill and blast method is a main method for excavating hard rock tunnels. In the face of complex construction environments in urban environments, such as ultra-shallow burial, passing through dense buildings on the surface, historical relics and historic sites etc. In order to ensure the safety of adjacent structures, control blasting measures must be taken in tunnel blasting constructio...

AI Technical Summary

Problems solved by technology

The traditional drilling and blasting method uses non-electric detonators or electric detonators to detonate. Due to the limitation of the detonator segment, the blasting vibration speed is very high, while the digital detonator uses PLC programming, which can accurately control the delay time of the detonator, and can significantly reduce the vibration by using the waveform interference superposition effect. The peak velocity is 60%, and the vibration peak generally appears in the first wave, but the vibration velocity for ultra-close adjacent buildings still cannot meet the specification requirements

Images