US 12,392,594 B2
Efficient and energy-saving blasting method based on notched blast hole
Xuefu Zhang, Chongqing (CN); Bo Hu, Chongqing (CN); Jian Zhang, Chongqing (CN); Bo Chu, Chongqing (CN); Chunlong Wang, Chongqing (CN); Peiheng Guo, Chongqing (CN); and Qiusheng Deng, Chongqing (CN)
Assigned to Chongqing Jiaotong University, Chongqing (CN)
Filed by Chongqing Jiaotong University, Chongqing (CN)
Filed on Jul. 13, 2023, as Appl. No. 18/221,411.
Claims priority of application No. 202211001967.2 (CN), filed on Aug. 20, 2022.
Prior Publication US 2024/0060761 A1, Feb. 22, 2024
Int. Cl. F42D 1/08 (2006.01); F42D 3/04 (2006.01)
CPC F42D 3/04 (2013.01) [F42D 1/08 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An efficient and energy-saving blasting method based on a notched blast hole, comprising:
S1: 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;
S2: 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;
S3: 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;
S4: 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
S5: filling the cutting hole with blasting explosive for blasting.