Deep hole blasting process in frost weathering bedrock segment

Abstract

The invention discloses a blasting process for vertical shaft construction, and in particular relates to a medium-length hole blasting process suitable for rapid construction when vertical shafts are constructed in frozen weathered bedrock sections, frozen gravel layer sections and frozen calcareous clay sections. The method comprises the following process steps of 1: drawing a blast-hole coordinate position graph and numbering every blast hole; 2: determining the diameter and depth of every blast hole; 3: drilling according to the coordinate position and specified diameter and depth of everyblast hole; 4: determining the charging uncoupling factor of every blast hole and the diameter of explosive cartridges; 5: determining the length of the explosive cartridges according to the quantityof explosives used for the blast holes; 6: packing the explosives according to the quantity of explosives used for the blast holes; 7: installing priming detonators in the blast holes; 8: determiningthe segment number of the detonators according to the blasting sequence of the blast holes and using detonator priming conductors and a priming apparatus to connect all the priming detonators according to the segment number of the priming detonators; 9: plugging the blast holes; and 10: pressing the priming apparatus to initiate explosion after personnel are evacuated.

Description

Technical field [0001] The invention relates to a vertical well shaft construction blasting process, in particular to a medium-deep hole blasting process suitable for rapid construction when a vertical shaft shaft is constructed in a frozen weathered bedrock section, a frozen gravel layer section and a frozen solid calcareous clay section. Background technique [0002] At present, in the construction of the frozen and weathered bedrock section, the frozen gravel section and the frozen solid calcareous clay section of the shaft shaft, manual construction or shallow hole blasting construction is mostly used. There are the following shortcomings: ①Manpower construction, high labor intensity of workers, low excavation efficiency, and slow cycle progress; ②Shallow hole blasting construction, less cycle footage, after blasting, there is stubble between the surrounding holes and the well bank or need to be blasted in stages, which is very troublesome; ③Explosive materials such as explos...

AI Technical Summary

Problems solved by technology

There are the following disadvantages: ① manual construction, high labor intensity, low excavation efficiency, and slow cycle progress; ② shallow hole blasting construction, less cycle footage, stubble between the peripheral hole and the side of the well after blasting, or blasting in stages, which is very troublesome; ③ Explosives, detonators and other blasting materials consume a lot, and the cost is high; ④ The surrounding rock of the side of the well is exposed for a long time, which is prone to chipping and has many safety hazards;

[0003] Using manual construction or shallow hole blasting construction is time-consuming, laborious, wasteful of materials, and unsafe, and cannot meet the requirements of fast, high-quality, and efficient construction of shafts

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