Study on Optimum Powder Factor and Quality of Ezplosives in Surface Mines
Bulk explosives, booster and blast design play an important role in rock blasting. Bulk explosives are booster sensitive explosives. The firing density is in range of 1.05 to 1.20 g/cm3. The velocity of detonation and absolute weight strength (AWS) is in range of 3500 to 4500 m/s and 500 to 850 kcal/kg. Powder factor is an important economic index for assessment of blastabiliy of rock. The optimum powder factor for any surface mines is depends upon various factors such as geology of rock, blast design, explosive energy output and its utilization. The optimum powder factor is most of mines in CIL was recorded. The powder factor in NCL, BCCL, SECL, ECL, WCL, and West Bokaroo Collieries was in range of the optimum powder factor and quality of explosives was measured. The rating index of bulk explosives is varies in between 70 and 100. The powder factor in hard rock was 1.5 to 2.5 ma/kg and in soft rock it was in range of 2.0 to 3.0 m3/kg.
powder factor reveliance surface mines
Nabiullah B.M.P.Pingua Jagdish K.L.Patel A.Sinha
Central Institute of Mining And Fuel Research, Dhanbad, Jharkhand, India Indian Oil Corporation, Faridabad,Hariyana, India
国际会议
The Second Asian-Pacific Symposium on Blasting Techniques(第二届亚太地区爆破技术研讨会)
大连
英文
351-357
2009-07-01（万方平台首次上网日期，不代表论文的发表时间）