Abstract
1. As the impact energy increases, the relative energy loss to elastic wave emission decreases. When the impact energy is 225 kg-m, the loss is 10%, but when it is 700 kg-m, the loss falls to 9%. Thus to cut down the relative energy losses to seismic radiation into the rock, the latter should be fragmented by powerful impacts. 2. The three-component tensometric gage specially developed for measuring the stresses in an elastic wave in the solid block is also suitable as a reliable vibrometer. Gages of this type can be used to investigate the state of stress of the solid rock during the operation of dynamic plows.
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