| 摘要 |
The invention relates to methods for measurement of geometric parameters of underground cavities formed as result of distortion of massif of rocks with lift ore discharge workings and self-breakage of walls of those workings, as result of that cavity is formed that has one entrance to its space placed in the upper part of the cavity. Method for measurement of geometric parameters of underground cavities includes placement of laser scanner through opening in the upper part of the cavity, its fixation in the lower part of the cavity in surface of rock placed in lift working, sequential angular orientation 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 pf angular orientation of scanner. Laser ray is directed upwards for survey of cupola-like surface of cavity, at that laser scanner is equipped with block of automated switch and it is placed on frame with movable supports and device for leveling in horizontal position, frame is attached to cable by means of which laser scanner is lowered through not broken section of lift working to cavity to its lower surface that is formed with plane of rock, and after supports of the frame touch surface of the rock one performs leveling of frame, switches on scanner and measures geometrical parameters of cavity through angular orientation of laser ray. The invention makes it possible to obtain accurate data on real configuration of cupola-like cavity, this gives possibility to make decision on following operation of lift working. |
