Application and exploration of speedy drivage technology of carbon dioxide fracturing blasting
ZHEN Enze
DONG Shizhuo
Li Chen
Abstract：In view of the low efficiency of hard rock excavation when drilling and blasting method was limited,carbon dioxide gas phase blasting technology was proposed to loosen and crack hard rock mass.Taking a coal bunker excavation face as the research background,the fracturing hole layout pa-rameters of coal bunker section were designed by theoretical analysis and field test,and the field test of carbon dioxide cracking and loosening was carried out.The results show that under the current technical system,due to improper sealing measures,carbon dioxide gas phase blasting technology can not achieve the expected loosening effect in the process of hard rock fracturing.According to the test feedback results,the optimization method of adding sealing device,adding blasting energy guiding fracture and adjusting blasting parameters was proposed,and the scheme suitable for hard rock frac-turing was preliminarily explored.These improved ideas are helpful to realize hard rock fracturing and improve mechanical driving efficiency.
Keywords：gas phase blastingsplitterlayout of fracturing holerock fracturingspeedy drivage
Publication Date：2024-06-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 10-15 )