CUMULATIVE BLASTING EXPERIMENT STUDY OF SLOTTED CARTRIDGE BASED ON HARD-ROCK RAPID DRIVING TECHNOLOGY
YANG Renshu1,ZHANG Zhaoran1,YANG Liyun1,GUO Yixian2
(1. School of Mechanics and Civil Engineering,China University of Mining and Technology,Beijing 100083,China;
2. BGI Engineering Consultants Ltd.,Beijing 100038,China)
Abstract:In order to test adaptability and directed blasting parameters of slotted cartridge in rock driving,firstly, design of blasting parameters is optimized,and making the hole utilization rate reach more than 90%,the requirements of rapid driving and smooth blasting are reached. Secondly,after the success of blasting program,the both-sides comparison experiment of the surrounding holes and all surrounding holes comparison experiment are made,hole mark rate can reach 90%. At the same space,the best charge is 0.5 kg,and it can be less 16.7% and 37.5% than smooth blasting and ordinary blasting. At the same charge,blast-hole space can be extended from 450 mm to 550 mm,improvement rate is more than 22%. The experiment results show that control blasting using the simple slotted cartridge can be better for forming and taking more benefits for enterprise;it is suitable for spread in rock rapid driving.
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