Expansion pipe for blasting and blasting method of expansion pipe

Abstract

The invention relates to an expansion pipe for blasting and a blasting method of the expansion pipe, and belongs to the technical field of mining. The expansion pipe comprises a main pipe and a branch pipe, wherein a first plug is arranged at the head end part of the expansion pipe, a second plug is arranged at the tail end part of the expansion pipe, and the branch pipe is fixed to the inner part of the main pipe through the first plug; a gasification agent is put in the branch pipe, an electric starter mounted on the first plug is arranged at the inner part of the branch pipe, and a sealing plug is arranged at the other end of the branch pipe; a connecting pipe is also arranged at the head part of the main pipe, one end of the connecting pipe is connected with an air source or a water source, and the other end of the connecting pipe penetrates through the first plug and communicates with an inner cavity of the main pipe. The blasting method comprises the following steps: when the expansion pipe is used, fixing a group of the expansion pipes end to end through fixing components in a connecting manner; then punching a hole in a blasting point; then putting the connected and fixed expansion pipe group into the hole; sealing the opening of the hole with cement; and finally starting the electric starter through a remote controller outside the dangerous range. The gasification agent is ignited by the electric starter, so that water in the main pipe is gasified, or air in the main pipe is expanded, and the expansion pipe is blasted.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to an expansion pipe for blasting and a blasting method thereof. Background technique [0002] At present, in mining technology, in the process of mining mines by blasting, the commonly used method is explosive blasting. Mine blasting comes from the development and extension of blasting. It is defined as: using explosives in air, water, earth and rock media or objects The compression, loosening, destruction, throwing and killing effects produced by the explosion are a technology to achieve the expected purpose. [0003] 1) Classification of open-pit mine blasting: deep hole blasting on steps, secondary blasting on large blocks and foundations, controlled blasting near slopes, etc. [0004] 2) Blasting methods: secondary blasting such as differential blasting, extrusion blasting, controlled blasting, shallow eye blasting and exposed charges. [0005] Explosive blasting m...

AI Technical Summary

Problems solved by technology

[0006] The invention overcomes the shortcomings of the existing explosive blasting, and provides an expansion tube for blasting and a blasting method thereof. The expansion tube has no inflammable and explosive items inside, and there is no potential safety hazard in the operation process, and the structure is simple and low cost. lower

Images