Application of hand-held laser rangefinder in underground mine
As a kind of rangefinder, hand-held laser rangefinder has unique functions and characteristics compared with ordinary rangefinder. It is mainly used in mines to combine domestic theodolite to form a prism-free semi-station instrument, which is used to measure points, section height and stope area in underground stopes. Before a company bought a hand-held rangefinder, what was the original underground measurement method? At the end of 1998, two geological survey groups jointly measured the volume of a stope, and the result was 55,000 cubic meters for one group and 68,000 cubic meters for the other group. Measure one measured value at a time, and the measured values differ greatly several times, so the results dare not be measured again. 2. Slow speed and low efficiency. The underground working environment can't be compared with the ground environment at all. Due to the limitations of poor underground conditions, dark light and low * * coefficient, the measuring speed is very slow and the efficiency is very low. Often, a measuring point takes several times more than the usual measuring time. 3. Although the domestic pulse hand-held rangefinder can also measure distance, because it is ultrasonic ranging, people can't see the position of the target point, and the measuring range is too short and the accuracy is low, which greatly limits its application range. In the underground survey, only the surveyors need to set up a theodolite and a rangefinder, and there is no need to stand at the target point. The survey task can be completed smoothly, safely and accurately in a short time, which overcomes the shortcomings of slow speed, low efficiency and poor accuracy in the past, especially the advantage that the handheld laser rangefinder can see the red laser point in the underground survey is especially praised by surveyors. Handheld laser rangefinder can also be used alone in underground measurement, which is quite convenient and can also store a lot of measurement data without underground measurement records. Hand-held laser rangefinder can be used not only conveniently in underground, but also in open-pit slope measurement and lofting.
