FIELD: oil and gas industry.
SUBSTANCE: invention refers to method for measuring stress wave and to a measurement unit and a rock breaking machine. An impact device transfers the impact pulses to a wave guide that generates a compression stress wave and a reflected tension stress wave propagating in the wave guide. The compression stress wave causes expansion of the wave guide, while the tension stress wave causes the sharpening, and in this case properties of the wave guide can be determined by measuring dimensional changes of the wave guide cross-section. Said measurements are analysed to control the rock breaking machine.
EFFECT: improved method and device.
11 cl, 25 dwg
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