Permitted explosives used in underground coal mines ...
@misc{etde_6561939, title = {Permitted explosives used in underground coal mines} author = {Karunesan, P, and Chakraborty, S K} abstractNote = {Mining of coal by underground method had a very long history and before 1984-85, i.e., a decade after the coal mines nationalization, production from underground units were predominantly from these units. Only after 1984-85
