The detection of misfired dynamite is a very important problem for safety excavation, but no effective methods have been developed until now.
The authors devised the detection method of misfired dynamite by inserting the magnetic tracer together with dynamite in blast hole. Primary magnetism can be detected after blasting if misfired dynamite is left in blast hole, and it can scarcely be measured if dynamite is completely exploded.
As conventional magnetometers are not available for this purpose, the authors have developed the prototype magnetometer for detecting misfired dynamite and found that it can be available for practical purpose.
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