In situ stress measurement method of deep borehole based on multi-array ultrasonic scanning technology

In order to improve the accuracy and efficiency of deep in-situ stress measurement, based on wall collapse in borehole, a borehole measurement method multi-array ultrasonic scanning technology is proposed this paper. The solution idea using combination multiple elements for contour put forward, suitable fine horizontal section geological formed. Through analysis calculation principle hole caving derivation element algorithm, device developed by effective fusion full waveform signals reconstruction contour. combined with studied. Finally, feasibility are verified physical experiments. results show that: can break through limitations conventional probe placement medium sound velocity calibration, accurate 360° shape. obtain shape data at any depth, then three-dimensional wall, which provide new technical means detection measurement.