| 摘要 |
Method for measurement of geometric parameters of underground cavities that includes placement of laser scanner through opening in the upper part of cavity, its fixation in the cavity, sequential angular direction of scanner with given pitch and directing laser ray in direction of placement of surface being measured, determination of distance from range meter to measured point on surface of cavity at each step of angular directing of scanner, at that range meter is fixed in the lower part of the cavity on surface of rock placed in elevation, and laser ray is directed upwards for mapping cupola-like surface of cavity, at that laser scanner is equipped with block of automated switch and is placed on frame with movable supports and device for horizontal leveling, frame is fixed to cable by means of which laser scanner is lowered through not broken part of elevation to cavity to its lower surface formed with plane of rock, and after frame supports touch surface of he rock one performs horizontal leveling of frame, switch on of scanner and measurement of geometrical parameters of cavity through angular direction of laser ray. |
