Controlled Blasting Technology for Connection Between Mine Shaft Bottom and Ingate of Mine Auxiliary Shaft
Abstract：In order to solve the blasting vibration, surrounding rock stability lost and blasting rock flying problems occurred in the blasting operations for the connection between the deep mine shaft ingate and the shaft bottom, according to the rock strata features in the underground mine, a combined construction plan with the sectional design, slicing construction and pilot blasting and excavation technology was provided. A millisecond delay blasting, central pilot, circumference blasting and circumference smooth blasting and series controlled blasting technology were applied to the blasting operations of the top and low connection area for the ingate and the shaft bottom roadway. The practices showed that the blasting method with a small circulation, a small quantity explosives, slicing and section could effectively control the blasting rock flying and the vibration affected to the mine shaft liner, surrounding rocks and permanent support and could ensure the construction safety, quality and construction period.
Keywords：controlled blastingingateslicing constructionpilot construction
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 24-26 )