PRACTICE ON IMPROVEMENT OF BLASTING EFFICIENCY IN DRIFT EXCAVATION WITH REASONABLE CUT METHOD AND BLASTING PARAMETER
Rao Xue-zhi · Engineering Blasting · 2006
Regarding the low blasting efficiency in the excavation of drift in one iron deposit,the paper taken the cutting method and blasting parameters as the main influencing factors;and selected out the reasonable cutting method and blasting parameters based on the test results performed in site by comparing the three cutting modes of the double cuneiform,the single helix and the nine hole.The construction practice indicated that the blasting efficiency in drift was improved and good economic benefits were obtained by the adoption of single helix cutting mode.