The Application of Controlled Blasting Technique in False Roof Mining

摘要

Mechanism of controlled blasting and the delay time of blasting are described in this thesis. At the same time, other factors for blasting such as the charge and parameters are determined. The successful applications of controlled blasting technique for false roof mining in Gaozhuang Mine of Pingdingshan Mining Bureau have attained outstanding economical & social benefits, which have not only improved blasting quality, reduced blasting concussion and the subsidence of nether roof, but also lowered the boulder yield, uniformed the block of blasting production.