Application of handheld laser range finder in mines
As a kind of rangefinder, the handheld laser rangefinder has unique functions and characteristics compared with ordinary rangefinders. In mining applications, it mainly uses domestic theodolite to combine into a prismless half-station. It is used in measuring point location, section height, stope area, etc. in underground stopes. Before a certain unit purchased a handheld rangefinder, what was the original underground measurement method? At the end of 1998, two geological survey groups jointly measured the volume of a stope. The result was that one group was 55,000 cubic meters and the other group was 68,000 cubic meters. square. Measure one measurement value at a time. The measurement values are very different from each other. The result is that I dare not continue to measure again. 2. Slow and low efficiency. The underground working environment cannot be compared with the surface environment at all. Due to the limitations of poor underground conditions, dark light, and low coefficients, the measurement work speed is very slow and the efficiency is also very low. One measurement point often takes several times more than the normal measurement time. 3. Although the domestic pulse-type handheld rangefinder can also measure distance, because it uses ultrasonic ranging, people cannot see the position of the target point. In addition, the measurement range is too short and the accuracy is low, which greatly limits its scope of use. In underground measurements, the surveyor only needs to set up a theodolite and a distance meter, and no one is required to stand at the target point. The measurement task can be completed smoothly, safely and accurately in a short time, overcoming the previous challenges. It has shortcomings such as slow speed, low efficiency, and poor accuracy. In particular, the advantage of the handheld laser rangefinder in underground measurement that the red laser point can be seen is particularly praised by surveyors. The handheld laser rangefinder can also be used alone in underground measurements, which is very convenient and can store a large amount of measurement data without the need for underground measurement records. In addition to being convenient for use underground, the handheld laser rangefinder can also be used for open-air slope measurement and stakeout.
