Partition control blasting method for tunnel rock drilling project

Abstract

The invention discloses a partition control blasting method for a tunnel rock drilling project. The partition control blasting method sequentially comprises the steps that a rock drilling working surface is partitioned into a slotting partition, an upper and down slot expanding partition, an auxiliary collapsing partition, an auxiliary collapse lifting partition and a light blasting partition, and all the partitions are drilled to form holes; the blast holes are filled with explosives; rock drilling section blasting is started; the slotting partition and the upper and down slot expanding partition are blasted; then the auxiliary collapse lifting partition is blasted; the auxiliary collapsing partition is blasted; finally the light blasting partition is blasted. The partition control blasting method is a project blasting method used for underground rock drilling projects with large sections and has the advantages that the blasting vibration can be controlled, and the blasting effect can be improved.

Description

technical field [0001] The invention relates to an engineering blasting method used in underground large-section rock drilling engineering, capable of controlling blasting vibration and improving blasting effect. Background technique [0002] like figure 1 As shown, in the traditional drilling and blasting method, the caving and avalanche areas during blasting are basically the same, each accounting for 1 / 2 of the drilling section. At the same time, the drilling and blasting control of the traditional rock drilling section is weak. When the blasting is started, the blasting stress between the blasting holes will cancel and interfere with each other, resulting in the inability to exert the power of the blasting explosives and low blasting efficiency. The negative effects of blasting such as stress failure and disturbance are relatively large, especially when the geology of the rock drilling section is relatively complicated, it may cause serious consequences. [0003] In ad...

AI Technical Summary

Problems solved by technology

At the same time, the drilling and blasting control of the traditional rock drilling section is weak. When the blasting is started, the blasting stress between the blasting holes will cancel and interfere with each other, resulting in the inability to exert the power of the blasting explosives and low blasting efficiency. The negative effects of blasting such as stress failure and disturbance are relatively large, especially when the geology of the rock drilling section is relatively complicated, it may cause serious consequences

[0003] In addition, the traditional wedge-shaped drilling and blasting method is a construction method that is relatively easy to grasp and has universality. It has strong applicability, but in the actual application process, this method does not distinguish geological conditions. , there are the following phenomena: large angle and large resistance line, increasing the height of the cut, increasing the depth of the cut, increasing the amount of charge in the hole, increasing the amount of charge in the same section of the cutting hole, and the maximum amount of charge is difficult to control, etc. ; During the blasting, the stress damage and disturbance to the rock around the tunnel are relatively large, especially when the geology of the rock drilling section is relatively complicated, it may cause serious consequences

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