Study on the High Bench Cast-Blasting Effects Influenced by Explosive Specific Charge

Abstract:

Explosive specific charge is the key to the high level of casting blast. In order to study how the explosive specific charge affects the high bench cast blasting, theoretical analysis and experimental study were used in the Hei Dai-gou open pit cast blasting. Experimental study shows that: under the same engineering geological conditions and blasting parameters, the throw distance increases as the average explosives specific charge increases, and this trend slows down gradually. Settlement muck-pile height increases as explosives specific charge increases, and then gently muck-pile shape tends to be more conducive to the work platform dragline flat-field and inverted reactor efficiency. When q> 0.65 kg/m³, the cast percentage can reach more than 30%, as 0.67 kg/m³ <q <0.70 kg/m³, the cast percentage increases with a significant effect as the explosives specific charge increases; when q> 0.74 kg/m³, the increasing rate of the cast percentage with the increase of explosive specific charge decreases.

• Periodical: Advanced Materials Research (Volumes 250-253)
• Pages: 3763-3768
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.250-253.3763
• Online since: May 2011
• Authors: Xiang Long Li, Dian Shu Liu, Long Fa Luan, Yi Yang, Zhi Yu Zhang
• Keywords: Cast Percentage, Explosive Specific Charge, High Bench Cast Blasting, Muck-Pile Shape

References

[1] Chironis N.P. Efficient stripping new washer build markets.coal Age,1962,67(5):64-67

[2] Xiping Ding. Deep bench blasting stress field and a number of design parameters of the numerical analysis [D]. Academy of Railway Sciences,2001,1:4-6.In Chinese

[3] Jinglan Pan. Casting blast stepped in open discussion on the application of mining [J]. Chemical Mining Technology, 1992, 21(6):1-4.In Chinese

[4] Dianzhong Liu, Zhongqian Wang.Bulge accumulation of movement and throwing [J]. Explosion and Shock, 1983,7,3(3):1-8.In Chinese

[5] G. Harris. Blasting hole size drum kits and the calculation of rock pile [J]. The second session of the International Conference on blasting rock breaking:174-206.In Chinese

[6] Chironis N.P. Blast casting pays off at Avery .Coal Age, 1982, 87 (11):40-43

[7] L.L. Davis, L.G. Hill. ANFO Cylinder Tests[J].AIP Conference Proceedings, 2002:165-168

[8] Langefors. Rock blasting modern technology [M]. Coal Industry Publishing House1979.In Chinese

[9] Jiahan Zhou, Lianbo Xu, Venus male. Explosive throwing ability is relatively [M]. Proceedings of Soil and Rock Blasting, Beijing, Metallurgical Industry Press,1980, 69-74.In Chinese

[10] Shouru Chen, Domestic and foreign open pit bench blasting design [J]. Mine Technology,1989 (3):18-24.In Chinese

[11] Zhaohua Guo. Opencast Blasting Technology Research and Application of throwing [J]. Coal engineering, construction technology,2008(1):31-35.In Chinese

[12] Kemin Li, Youdi Zhang, Hongxian Fu. Opencast coal mine blasting parameters of Casting [J]. Mining and Safety Engineering,2006, 23(4):423-426.In Chinese

[13] Xianbo Ning translation.Canadian experience in open coal casting blast [J]. Surface Mining Journal,1988,1:50-58.In Chinese

[14] Anonymous.Chirouis.Casting Overburden: An Explosive Idea .Coal Age, 1982:72-75

[15] .Chironis N.P. Mines Take on Explosive Casting. Coal Age, 1981, 10:130-133

[16] Watkins, Thomas.Site Specific Application of Explosive Casting.Suface Coal Mining and Reclamation Symposium, Coal Conference and Expo VI, October 27-29, 1981, Louisville, KY, pp.138-146

[17] Grippo A P. How to get more cast per blast .Coal Age, 1984, 89, (12):63-69

[18] Chironis N.P. Spiced-up ANFO mixture leads to super blasts for casting .Coal Age,1984, 89(5): 52-55