Blasting method for roadway or tunnel tunneling based on field mixed loading emulsion explosive

Abstract

The invention discloses a blasting method for roadway or tunneling based on field mixed loading of emulsion explosives. The blasting method comprises the following steps: preparing an emulsion matrix by a preparation station; loading sensitizers with various concentrations and the prepared emulsion matrix on mixed loading equipment; mixing and stirring emulsion explosives on site in the roadway or the tunnel by using mixed loading equipment, and loading explosives into the blast holes of the tunnel face; wherein the density of the on-site mixed emulsion explosives filled in the smooth blasting holes is lower than that of the on-site mixed emulsion explosives filled in the other blasting holes; the filling amount of the on-site mixed emulsion explosive in all the blast holes is determined according to the on-site rock quality property condition, and the explosive is loaded in a coupling mode. The device has the beneficial effects that the advantages of safety and the like of on-site mixed loading of explosives are brought into full play, the working intensity of personnel is greatly reduced, and the explosive loading efficiency is improved; the explosive adopting the zero-oxygen balance process formula reduces harmful gas; the number of tunnel face blasting holes is reduced through coupling charging, the blasting circulation footage is improved, the comprehensive blasting cost is reduced, and the construction period is shortened.

Description

technical field [0001] The invention belongs to the technical field of engineering blasting, and relates to a blasting method for roadway or tunnel excavation based on on-site mixing of emulsion explosives. Background technique [0002] At present, the drilling and blasting method of roadway or tunnel excavation mainly adopts the operation method of packaging explosives, which has the disadvantages of high labor intensity, low operation efficiency and high operation cost. On-site mixed explosives have the advantages of safety, economy, high efficiency and environmental protection. They have been widely used in large-scale mines, water conservancy and hydropower, municipal engineering and other open-air fields, and have been well received by users. Compared with open-air geotechnical blasting, the roadway or tunnel excavation section is small, the single-hole charge is small (usually 1~5kg), and the total charge of a single blasting is small, especially the surrounding hole s...

AI Technical Summary

Problems solved by technology

Compared with open-pit rock and soil blasting, roadway or tunnel excavation section is small, single-hole charge is less (generally 1~5kg), and the total charge of single blasting is small, especially the smooth surface blasting around the hole still needs to use packaged explosives, so On-site mixed explosives are hindered in the application of roadway or tunnel excavation blasting

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