Application of Handheld Laser Range Finder in Mine
As a rangefinder, the handheld laser rangefinder has unique functions and characteristics compared with ordinary rangefinders. Its application in mines mainly uses the combination of domestic theodolite to form a non-prism half-station instrument. It is used in downhole stope to measure point position, section height, stope area, etc. Before a certain unit purchased a hand-held rangefinder, what was the original downhole 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 m3, and the other was 68,000 m3. square. Measure one measurement value at a time, and the difference between several measurement values is very large, so I dare not continue to measure again. 2. Slow speed and low efficiency. The underground working environment cannot be compared with the ground environment at all. Due to the limitations of poor underground conditions, dark light, and low safety factor, the measurement work speed is very slow and the efficiency is also very low. It often takes several times more than the usual measurement time for one measurement point. . 3. Although the domestic pulse-type handheld rangefinder can also measure distance, because it is ultrasonic distance measurement, 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 the underground measurement, the surveyor only needs to set up a theodolite and a range finder, and the target point does not need to be stationed. The measurement task can be completed smoothly, safely and accurately in a short time, which has overcome the previous problems. The disadvantages of slow speed, low efficiency, and poor safety, especially the advantage that the handheld laser rangefinder can see the red laser point in the downhole measurement, are particularly praised by the surveyors. The hand-held laser range finder can also be used alone in the downhole measurement, which is quite convenient and can store a large amount of measurement data without the need for downhole measurement records. In addition to being convenient to use underground, the handheld laser rangefinder can also be used for open-air slope measurement and stakeout.
