Aug 19, 2025

US12392594 - Efficient and energy-saving blasting method based on notched blast hole

An efficient and energy-saving blasting method based on a notched blast hole includes forming a cutting hole, an auxiliary hole, and a peripheral hole on a surface of an area to be blasted separately by means of a drilling apparatus. The cutting hole, the auxiliary hole, and the peripheral hole are formed on the surface of the blasting area separately, and notches with different numbers are formed on outer sides of the holes separately, such that in a blasting process, explosion energy of explosives can be transmitted along the notches, the explosion energy is guided, energy loss is reduced, blasting efficiency is improved, thus a range of a crushing area is reduced, a length of a main crack is increased, and a better blasting effect is achieved. Moreover, explosive energy is concentrated on the notch to initiate crack, so as to reduce an explosion smash area.

Assignee: Chongqing Jiaotong University
Inventors: Xuefu Zhang, Bo Hu, Jian Zhang, Bo Chu, Chunlong Wang, Peiheng Guo, Qiusheng Deng
Filing date: 2023-07-13

The patent describes an innovative blasting method that utilizes notched blast holes to enhance efficiency and reduce energy loss during explosions. By strategically forming cutting, auxiliary, and peripheral holes with varying notch configurations, the method aims to improve blasting effectiveness and control the area affected by the explosion.

Claim 1

An efficient and energy-saving blasting method based on a notched blast hole, comprising: S 1 : forming a cutting hole, an auxiliary hole, and a peripheral hole on a surface of an area to be blasted separately by means of a drilling apparatus; S 2 : forming a notch on an outer side of the cutting hole by means of a notching apparatus, wherein a notching mode uses four-direction notches; S 3 : forming a notch on an outer side of the auxiliary hole by means of the notching apparatus, wherein a notching mode uses three-direction notches; S 4 : forming a notch on an outer side of the peripheral hole by means of the notching apparatus, wherein a notching mode uses two-direction notches; and S 5 : filling the cutting hole with blasting explosive for blasting. S 1 : forming a cutting hole, an auxiliary hole, and a peripheral hole on a surface of an area to be blasted separately by means of a drilling apparatus; S 2 : forming a notch on an outer side of the cutting hole by means of a notching apparatus, wherein a notching mode uses four-direction notches; S 3 : forming a notch on an outer side of the auxiliary hole by means of the notching apparatus, wherein a notching mode uses three-direction notches; S 4 : forming a notch on an outer side of the peripheral hole by means of the notching apparatus, wherein a notching mode uses two-direction notches; and S 5 : filling the cutting hole with blasting explosive for blasting.

Google Patents

https://patents.google.com/patent/US12392594

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12392594