Shield underground bedrock boulder blasting method

Abstract

The invention belongs to the technical field of shield underground bedrock boulder blasting, and particularly relates to a shield underground bedrock boulder blasting method which comprises the following operation steps: S1, comprehensively considering the terrain, lithology and surrounding environment conditions of a blasting area through on-site survey of the blasting area of a construction site; the method has the beneficial effects that one end of the bus is connected with the electronic LG controller, the electronic LG controller is controlled to detonate the electronic detonator, and therefore the effects that the blasting effect is good, the blasting speed is high, the blasting speed is high, and the blasting efficiency is high are achieved. And after blasting is completed, the blasting effect is detected, drilling and sampling are conducted again at the middle positions of the four adjacent ground drill holes, whether the sampled samples are broken uniformly or not is checked one by one, and therefore the blasting safety and the blasting uniformity are improved.

Description

technical field [0001] The invention relates to the technical field of lone stone blasting of shield underground bedrock, in particular to a method for blasting lone rock of shield underground bedrock. Background technique [0002] Rock blasting is a mechanical process in which the explosive action of explosives is used to apply loads to rocks and destroy them. [0003] The explosive energy breaks the rock and is released in two ways: blast shock wave and blast gas. [0004] According to the theory of explosive gas expansion, the rock damage caused by explosive explosion is mainly caused by the expansion of high-temperature and high-pressure gas products. The expansion of the gas generated by the blast causes the radial displacement of rock particles, and the displacement speed is the highest in the direction of the minimum resistance line. The speed difference produces shear stress and shear failure, and is thrown radially under the push of the gas expansion generated by t...

AI Technical Summary

Problems solved by technology

[0008] For this reason, the present invention provides a shield underground bedrock lone rock blasting method. Electronic detonators are regularly loaded into boreholes, and electronic detonators are connected to each other through a busbar, and then one end of the busbar is connected to an electronic LG controller. Control the electronic LG controller to detonate the electronic detonator, which solves the problems of poor blasting effect and serious deformation of the ground after blasting.

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