Research and application of the technology of blast cracking to increase water injection in hard coal seam
LIU Bao-min
Abstract：In order to solve the problem of hard coal seam blast cracking difficultly,the blast cracking technol-ogy was used to coal seam,and increased coal seam fissure,took a coal mine of Pingdingshan Mining Area as study subject,to verify application effect of the blasting crack augmented injection technology in hard coal seam. The result showed that the crack extended range reached 2 ~ 3m after the single - hole blasting,Water injection flow rate and total volume increased significantly than normal drilling. When double holes blasting at the same time,made the coal body stress redistribution,between two holes in the formation of mutual penetra-tion of radial fracture and the ring into the fissure,The fracture extended range could be up to 6 m,the blasting effect is better than that of single hole blasting.
Keywords：blast crackinghard coal seamwater injection of coal seam
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 30-32,46 )