Blasting method and device of axial progressive secondary high-efficiency blasting device

Abstract

The invention discloses a blasting method of an axial progressive secondary efficient blasting device. The method includes the steps that a blasting barrel is installed in an auxiliary blast hole, the auxiliary blast hole is isolated from external air, a primary blasting body and a secondary blasting body are sequentially arranged in the blasting barrel, the primary blasting body carries out primary blasting, rock mass is subjected to cracking, rock looseness and the like, the primary blasting body generates the great energy-gathered blast wave effect and pushes the secondary blasting body to progressively drill into deep rock mass, and under the effect of a delay explosive in the secondary blasting body, microsecond delay secondary progressive blasting is generated. The microsecond blasting technology, the bottom lifting blasting technology and the water interval blasting technology are mainly utilized for design, blasting vibration is reduced, the quantity of chunks is reduced, the explosive unit consumption and the concentration of dust are reduced, the utilization rate of the blast hole is increased, and the blasting effect and the blasting safety are improved.

Description

technical field [0001] The invention relates to the technical field of blasting, in particular to a blasting method and device of an axial progressive secondary high-efficiency blasting device. Background technique [0002] At present, in the process of tunnel construction in my country, mechanized excavation has not been used on a large scale and has not reached the developed level. Blasting technology, especially drilling and blasting, is the main method of tunnel construction in my country, but the utilization rate of blast holes in tunnel excavation is low, and the blasting effect is low. It is not obvious that the low efficiency and slowness of the excavation depth is the main difficulty, and the construction is very difficult. [0003] In the process of coal mining in my country, especially in mines with complex geological conditions, extra-thick rock masses and coal seams are often encountered when driving roadways and coal seams. Blasting makes the excavation depth an...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a blasting method and device of an axially progressive secondary high-efficiency blasting device to solve the problem of low blast hole utilization and poor blasting effect of existing blasting devices

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