Mine underground upward route one-step stoping control blasting method

Abstract

The invention provides a mine underground upward route one-step stoping control blasting method. The method comprises the following steps: S1, designing the slotting type of blast holes and the arrangement form of auxiliary holes and peripheral holes; S2, designing blasting parameters including the number of the blast holes, the spacing of the blast holes, the depth of the blast holes and the explosive loading amount of the blast holes; S3, drilling the blast holes by adopting an existing drill jumbo; S4, carrying out explosive loading on the blast holes, wherein the explosive loading coefficient of annular slotting holes is 0.7-0.9, bottom holes are the same as the annular slotting holes, the explosive loading coefficient of the auxiliary holes is 0.6-0.8, the peripheral holes are loadedwith explosive in a smooth blasting mode, and all the blast holes need to be loaded with a roll of primer and blocked with water stemming; and S5, initiating a blasting network, wherein all the blastholes are reversely detonated by adopting hole bottoms, the slotting holes and the auxiliary holes are detonated by adopting electronic detonators, the peripheral holes are detonated by adopting detonating cords, and then the detonating sequence is designed for detonation. The mine underground upward route one-step stoping control blasting method has the advantages of high utilization rate of theblast holes, deep footage, good blasting effect, low blasting cost and the like.

Description

technical field [0001] The invention relates to the technical field of underground rock drilling controlled blasting in mines, in particular to a one-step recovery controlled blasting method for an upward approach in an underground mine. Background technique [0002] In recent years, due to the development of domestic technology, mines have introduced a large number of drilling equipment such as rock drilling rigs. Drilling rigs have high drilling efficiency, save labor and cost in mines, and can mechanize and automate all drilling and other work to improve mining efficiency. However, the overall volume of the rock drilling rig is relatively large, and it is difficult to fully deploy the swing arm of the rig when working in a small section underground, which makes it difficult to drill wedge-shaped holes for the rig, while the efficiency of other drilling equipment is low, and it is difficult to ensure mining efficiency. [0003] The inventors of the present invention have...

AI Technical Summary

Problems solved by technology

However, the overall volume of the rock drilling rig is relatively large, and it is difficult to fully deploy the swing arm of the rig when working in a small section underground, which makes it difficult to drill wedge-shaped holes for the rig. mining efficiency

[0003] The inventors of the present invention have found through research that the traditional underground controlled blasting method usually uses vertical cut holes, which are difficult to dig out rocks to form a large free space, thereby affecting the blasting effect of the auxiliary holes and peripheral holes behind, and reducing the excavation footage; At the same time, the distance between the bottom hole and the lower filling body in the traditional blasting method is small, and the shock wave generated during the bottom hole blasting will cause great damage to the lower filling body, and will increase the dilution rate and loss rate of the ore, causing great harm to the mine. Moreover, at present, millisecond delay detonator detonators are commonly used in underground mines to detonate optical blasting holes, which is difficult to accurately control the blasting time of blastholes, which affects the blasting effect of mine rocks.

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