Inshore underwater slope bedrock blasting excavation construction method and blasting charging structure

Abstract

The invention discloses an offshore underwater slope bed rock blasting excavation construction method and a blasting charging structure applied to the method, and the offshore underwater slope bed rock blasting excavation construction method sequentially comprises the steps of point fixing, positioning, drilling, filling and blasting. Specifically, a plurality of blasting points are determined according to a selected blasting area, the blasting points are distributed in the blasting area in a staggered array mode, a drilling ship is moved to the blasting points through a positioning device, the drilling ship is anchored to the blasting points, and a plurality of blasting holes are formed in the blasting points through drilling accurately determined by a drilling device. And the multiple blasting holes are sequentially filled with the multiple blasting charging structures, a blasting network is completed according to design connection, the blasting network is set to be in a millisecond delay blasting mode, the blasting network is excited and detonated, and blasting is completed. According to the offshore underwater slope bedrock blasting excavation construction method, the blasting effect is good, the unit consumption of blasting explosives is low, and the blasting construction cost is low.

Description

technical field [0001] The invention relates to the technical field of offshore underwater blasting, in particular to a construction method and a blasting charge structure for blasting and excavating the bedrock of a near-shore underwater slope. Background technique [0002] At present, the construction of near-coastal and port projects is developing rapidly, involving the reconstruction of port wharves and the excavation of submerged bedrocks, tunnels and shorelines of new port projects. However, the blasting mechanism and construction technology requirements of underwater blasting and land blasting are significantly different due to the difference of blasting medium, and the construction technology and process are significantly different. Usually, the underwater drilling and blasting operation environment is complex, that is, due to the influence of wind and waves, tides and swells on the sea surface, causing frequent changes in water level, current, sediment and other fac...

AI Technical Summary

Problems solved by technology

However, the blasting mechanism and construction technical requirements of underwater blasting and land blasting are significantly different due to the difference in blasting medium, and the construction technology process is significantly different

Usually, the underwater drilling and blasting operation environment is complicated, that is, it is affected by sea waves, tides, and swells, resulting in frequent changes in water level, current, sediment and other factors. The multi-field coupling effect of pressure and water resistance makes drilling platform (ship) fixing, drilling positioning, drilling accuracy, explosive filling and plugging quality control more difficult than land construction, and construction quality is difficult to guarantee

[0003] In related technologies, rock-based port and waterway projects often use the drilling and blasting method for construction, that is, the method of excavating rocks by drilling, charging, and blasting. The vibration and unit consumption of this construction method are relatively large, and the cost of blasting also higher

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