00000nam 2200000za 4500 9.841090 CaOODSP 20221107152013 cr ||||||||||| 170804s1965 oncad ob f000 0 eng d CaOODSP eng eng fre n-cn--- M34-20/59E-PDF Darling, J. A. Humidity and static electricity in pneumatic loading of blasting explosives [electronic resource] / by J.A. Darling and D.A.B. Stevenson. [Ottawa : Queen's Printer, 1965] iv, 28 p. : charts, ill. Technical bulletin ; TB 59 Caption title. Imperfect copy: cover missing. Digitized edition from print [produced by Natural Resources Canada]. Includes bibliographical references (p. 21). “The occasional generation of static electricity in ammonium nitrate jet loaders is a serious matter because of the potential hazard presented to the operating personnel through the premature ignition of the blasting caps and initiating devices resulting from the development and discharge of static electrical charges. Previous methods of control of these hazards have included the introduction of conductive hoses and the grounding of the metal injector of loaders. Electric blasting caps have been forbidden in bottom primed drill holes. In addition static proof safety fuses and detonating fuses have been developed. This work explores the possibility of controlling the generation of static electricity by additions of water or of water vapour generation to jet loaders. It has been discovered that this water vapour may be automatically provided by exposures of ammonium nitrate or ammonium nitrate-oil mixtures to an air stream of high relative humidity immediately prior to loading. This exposure limits, to safe values, the voltages produced in the ammonium nitrate-hose wall static electricity generating system that may be operating in a pneumatic loader"--Synopsis, p. i. Includes synopsis in French. gccst Mining industry gccst Explosives gccst Safety measures Stevenson, D. A. B. Canada. Natural Resources Canada. Canada. Mines Branch. Technical bulletin (Canada. Dept. of Energy, Mines and Resources. Mines Branch) TB 59 (CaOODSP)9.834857 PDF 1.44 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M34-20/M34-20-59-eng.pdf 299946