Application of handheld laser rangefinder in underground mines
The handheld laser rangefinder, as a type of rangefinder, has unique functions and characteristics compared to ordinary rangefinders. In mining applications, it mainly uses a combination of domestic theodolites to form a semi station without prism, which is used for measuring point positions, section heights, and mining volume in underground mining areas. 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 mining area, resulting in one group measuring 55000 cubic meters and the other group measuring 68000 cubic meters. Measure one measurement value at a time, but there is a significant difference between several measurements, and the result is that they dare not continue to measure.
2. Slow speed and low efficiency. The working environment underground cannot be compared to the ground environment at all. Due to limitations such as poor underground conditions, dim light, and low safety factors, the measurement speed and efficiency are slow, and often a measurement point takes several times more than the 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 measuring personnel to install a theodolite and a distance measuring instrument, and the target point does not require a person to stand. The measurement task can be completed smoothly, conveniently, and accurately in a very 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 distance measuring instruments that can see red laser points is particularly praised by the measuring personnel. In underground measurement, a handheld laser rangefinder 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 lofting.
