A Blasting Method for Segmented Differential Slump in Medium and Deep Holes

Abstract

The invention discloses a blasting method for segmental differential collapse of medium and deep holes. The number of blasthole rows of the target blasting object is ≥ 1, and the number of blastholes in each row is ≥ 2. The blasting steps include: sequentially determining the mth blasting object of the target blasting The single hole charge Q of the row of blast holes m ; in turn according to Q m , to determine the layered number n of single holes in the mth row of blast holes m ; in turn according to Q m and n m , to determine the charge structure of the m-th row of blastholes of the target blasting object; wherein, the i-th layer of the blasthole includes the i-th charge section and the i-th packing section, and the i-th packing section is located above the i-th charge section; The charging structure is to determine the charging method of the m-th row of blasting holes of the target blasting object and carry out construction; then determine the differential initiation sequence of the target blasting object, and blast the target blasting object. The above-mentioned blasting method can control the blasting advance distance within one time of the blasting step height, and at the same time improve the blasting quality.

Description

technical field [0001] The present application relates to the technical field of engineering rock-soil blasting, and in particular to a method for segmented and differential collapse blasting of medium and deep holes. Background technique [0002] Medium and deep hole blasting is a blasting method widely used in open-pit mines or geotechnical engineering projects in China. Medium-deep hole blasting refers to blasting with a blasthole diameter greater than 50mm and a blasthole depth of more than 5m. It has the characteristics of high security, good operating conditions, large mining capacity and high production efficiency. In the current blasting process used in open-pit mines or geotechnical engineering, in order to protect the transportation road ahead of the blasting area and the equipment and facilities that cannot be dismantled or moved from damage, it is necessary to effectively control the blasting distance. According to the blasting experience of my country's open-pi...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a blasting method for medium-deep hole segmental differential collapse, which solves or partially solves that the existing blasting method cannot control the blasting distance within 1×H at the same time, and improves the blasting quality to avoid Root and large technical problems

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