Quality and Performance of Permitted Explosives and Detonators used in SCCL Mines in India
Aspects in Mining & Mineral Science
Blast performance depends on geo-mechanical properties of rock, detonation properties of explosive systems and blast design parameters. For a mine having nearly constant geo-mechanical parameters and have fixed optimized blast pattern, the blast results are very much dependent on the quality of explosive products. For consistent blast results, quality of explosive should be consistent. Mine management needs to ensure that performance and quality of an explosive system are the same as that has
... same as that has been predicated or stated by the supplier. Periodic check of the quality and performance parameters of the explosives and accessories of different manufacturers collected from the users' magazines/blasting face serve as a useful mechanism towards ensuring safety and quality of such products. In this paper, quality evaluation of slurry and emulsion permitted explosives and permitted detonators of different firms supplied in SCCL were done at SCCL site and their impact on performances in underground coal mines were observed. Results of studies on post detonation toxic fumes were also done with the help of Rescue team of SCCL in presence of CIMFR Scientist which gives the real picture of toxic contents of explosives used in underground coal mines where working personals are allowed to work after 5 minutes of blasting. Deviations in the quality of explosive and detonator parameters were found which has direct impact on the underground coal production in SCCL mines. Based on the results of studies and CIMFR advice, explosive manufacturers improved the quality of their explosive products time to time aimed for getting desired coal production safely underground coal mines of SCCL in India. per SCCL purchase order. Out of thirty-seven samples of permitted explosives of different types thirty-five samples of permitted explosives satisfactorily met the quality requirement of density parameter and only two samples failed to meet the requirement of density which are depicted in Figure 11 mentioned below.