Handheld laser rangefinder as a rangefinder, compared with the ordinary rangefinder, it has unique features and characteristics in the application of the mine is mainly used in combination with domestic latitude and longitude, combined into a prism-free half-station, applied in the underground quarry measurement points, section height, quarry volume and so on. In a unit has not yet purchased a hand-held rangefinder before, the original underground measurement method is how to say: the end of 98 years two ground measurement group together to measure the volume of a quarry, the results of a group of 55,000 square, the other group is 68,000 square. Measure a measurement once a measurement value, several measurements differ greatly, the results dare not continue to measure again.

2. Slow speed, low efficiency. In the underground working environment can not be compared with the ground environment, in the poor conditions by the underground, dark light, low coefficient and other limitations, the measurement of the work is very slow, the efficiency is very low, and often a measurement of the point of spending several times more than the usual measurement time.

3. Domestic pulse-type hand-held rangefinder can also measure the distance, but due to ultrasonic ranging, people can not see the location of the target point, coupled with the range is too short, low precision, greatly limiting the scope of its use. In the underground measurement, only the surveyor set up a longitude and latitude plus a rangefinder, the target point also does not need to stand people, only a very short time can be smooth, safe and relatively accurate completion of the measurement task, overcoming the previous slow, inefficient, poor accuracy and other shortcomings, especially in the underground measurement in the hand-held laser rangefinder can be seen in the red laser point of the advantages of the surveyor especially let the surveyor praised. In the underground measurement can also be used alone handheld laser rangefinder, quite convenient, but also can store a large number of measurement data, without the need for underground measurement records. Handheld laser rangefinders are not only convenient for use downhole, but can also be used for open slope measurement and sampling.