Optimization and application of blasting parameters based on the ＂pushing-wall＂ mechanism

• Published in: International journal of minerals, metallurgy and materials Vol. 19; no. 10; pp. 879 - 885
• Main Authors: Ren, Feng-yu, Sow, Thierno Amadou Mouctar, He, Rong-xing, Liu, Xin-rui
• Format: Journal Article
• Language: English
• Published: Springer Berlin Heidelberg University of Science and Technology Beijing 01.10.2012; Springer Nature B.V; College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
• Subjects: Blasting; Blasting (explosive); Ceramics; Characterization and Evaluation of Materials; Charge; Charge materials; Chemistry and Materials Science; Composites; Corrosion and Coatings; Design parameters; Field tests; Glass; Impact analysis; Iron; Materials Science; Mathematical models; Metallic Materials; Metallurgy; Mines; Natural Materials; Pushing; Sublevel caving; Surfaces and Interfaces; Thin Films; Tribology; Walls; 事故发生率; 基础; 墙; 应用; 无底柱分段崩落法; 机制; 爆破参数优化; 现场测试; iron mines and mining; optimization; excavation; blasting
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-012-0642-y

The large structure parameter of a sublevel caving method was used in Beiminghe iron mine. The ores were generally lower than the medium hardness and easy to be driUed and blasted. However, the questions of boulder yield, ＂pushing-wall＂ accident rate, and brow damage rate were not effectively controlled in practical blasting. The model test of a similar material shows that the charge concentration of bottom blastholes in the sector is too high; the pushing wall is the fundamental reason for the poor blasting effect. One of the main methods to adjust the explosive distribution is to increase the length of charged blastholes. Therefore, the field tests with respect to increasing the length of uncharged blastholes were made in 12# stope of-95 subsection and 6# stope of Beiminghe iron mine. This paper took the test result of 12# stope as an example to analyze the impact of charge structure on blasting effect and design an appropriate blasting parameter that is to similar to No. 12 stope.