Method for detecting shape of large-diameter vertical shaft hole

• Main Authors: YANG GUANG, YANG HAIPENG, WANG HOUXING, ZHAO JIANQIU, NIE QINGKE, CHEN FUXING, SUN YUNQING
• Format: Patent
• Language: Chinese; English
• Published: 14.05.2014
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

The invention discloses a method for detecting a shape of a large-diameter vertical shaft hole. The method for detecting the shape of the large-diameter vertical shaft hole comprises the following steps that the vertical shaft hole is regarded as two concentric shaft holes, the size of the diameter of the inner shaft hole is set, and the inner shaft hole is regarded as a perpendicular shaft hole; the center of the shaft hole is set as the origin of coordinates, a WE direction and an NS direction which are perpendicular to each other are determined on the circumference of the inner shaft hole to serve as coordinate axes, and the four intersection points with the circumference are X, X', Y and Y' respectively and are regarded as detection points; a logging instrument is arranged in a shaft mouth and is adjusted to be level, detection parameters are set, detection probes are lowered at the four detection points of the shaft hole respectively and are maintained to be in a natural sagging state, hole diameter dete