The application of handheld laser rangefinder in underground mines
As a type of rangefinder, the handheld laser rangefinder has unique functions and characteristics compared to ordinary rangefinders. In mining applications, it mainly uses a combination of domestic theodolites to form a prism free half station instrument, which is used for measuring points, section height, and mining area in underground mining areas. What was the original underground measurement method before a certain unit purchased a handheld rangefinder? At the end of 1998, two geological survey groups jointly measured the volume of a mining area, and the result was that one group was 55000 cubic meters and the other group was 68000 cubic meters. Measure one value at a time, and the difference between several measurements is significant, so I dare not continue to measure.
2. Slow speed and low efficiency. The working environment underground cannot be compared to the surface environment at all. Due to limitations such as poor underground conditions, dim lighting, and low safety factors, the measurement speed and efficiency are slow, and often one measurement point takes several times more than usual measurement time.
3. Although domestic pulse handheld rangefinders can also measure distance, due to the use of ultrasonic rangefinders, people cannot see the position of the target point, and the measurement range is too short and the accuracy is low, greatly limiting its range of use. In underground measurement, it is only necessary for the measurement personnel to install a theodolite and a rangefinder, and the target point does not require standing personnel. The measurement task can be completed smoothly, safely, and accurately in a short time, overcoming the shortcomings of slow speed, low efficiency, and poor accuracy in the past. Especially in underground measurement, the advantage of handheld laser rangefinders that can see red laser points is particularly praised by the measurement personnel. In underground measurement, handheld laser rangefinders can also be used separately, which is quite convenient and can store a large amount of measurement data without the need for underground measurement records. In addition to being convenient for underground use, handheld laser rangefinders can also be used for outdoor slope measurement and layout.
