Research and application of anti-punching technology of cutting slit blasting charge in mining face
YU Yan
TANG Zhihua
Abstract：Cutting slit blasting is a key part of the construction of roof cutting and entry retaining,for the current blasting process there is a punch hole problem,Dingji Coal Mine improved the sealing agent,determined the optimal ratio through the study of the solidifica-tion time and strength of the sealing agent experiments,and conducted SHPB experiments on specimens with different specifications to study the mechanical properties of the sealing agent;at the same time,the sealing agent was studied,and finally designed and adopted the method of spaced sealing with double bladder bag sealer.In practical application,the punching rate is 1.45％,which proves that the sealing method is feasible and reliable,and accumulates experience for the prevention and control of blasting punching problems.
Keywords：blastingsealing holesealing materialsealing processSHPB experiment
Publication Date：2024-10-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 63-69 )