Method and system of measuring length of dry beach of tailing pond

Abstract

The invention discloses a method and a system of measuring a length of a dry beach of a tailing pond. The method comprises selecting monitoring profiles of the dry beach in the tailing pond, selecting at least three monitoring points and at least five auxiliary observation points on surface of the dry beach, obtaining absolute heights of each monitoring point and auxiliary observation point at an initial time, furthermore fitting a curve equation of the dry beach surface at the monitoring profiles of the dry beach at the initial time, during measurement, obtaining an absolute height of each monitoring point at current time in real time, combining the absolute height of each monitoring point and the curve equation of the dry beach surface at the initial time, determining current measurement errors of horizontal distances of each monitoring point of the dry beach surface from the beach top, furthermore determining a curve equation of the dry beach surface at the monitoring profiles of the dry beach at current time in accordance with a predetermined measurement error threshold, and determining the length of the dry beach at the monitoring profiles of the dry beach at current time in accordance with the absolute height of the water level and the curve equation of dry beach surface in the current moment, thereby realizing measurement of the length of the dry beach of the tailing pond. The method can timely, accurately and reliably measure the length of the dry beach, and thus accurately reflect actual security situations of the tailing pond and effectively reduce risks of occurring security incidents in the tailing pond.

Description

technical field [0001] The invention relates to the technical field of tailings pond safety, in particular to a method and system for measuring the dry beach length of a tailings pond. Background technique [0002] Tailings pond refers to a place formed by damming and intercepting valley mouths or enclosures to store tailings discharged after ore dressing or waste residues discharged from other industrial production (such as power generation waste residues); it is a place with high potential energy There is a risk of dam failure as a source of man-made debris flow hazards, so safety monitoring of tailings ponds is imperative. [0003] The tailings pond mainly passes through the tailings dam (the tailings dam includes two parts: the initial dam and the accumulation dam; the initial dam refers to the dam used to support the tailings stockpiling body in the infrastructure construction; the accumulation dam refers to the initial dam during the production process. A dam built wi...

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Problems solved by technology

[0007] (1) Due to the uncertainty of the amount of ore drawn each time in the tailings pond, the deposition process of the beach surface of the sedimentary beach is irregular, so the sedimentary beach is not a flat slope, but an undulating curved surface; at the same time, with the tailings With the continuous deposition of tailings in the slurry, the slope of the sedimentary beach also presents an ever-changing curve; in the existing slope calculation method, only two detection points are used to determine the length of the dry beach. Therefore, there is a large deviation in the dry beach length of the tailings pond measured by the existing slope calculation method, which cannot truly and accurately reflect the actual safety situation of the tailings pond

[0008] (2) Due to the vast area of ​​the dry beach of the tailings reservoir, many monitoring rods need to be set up on the surface of the dry beach according to the existing slope calculation method, and most of the monitoring rods are far apart, so the absolute height of the level gauge on the top of the monitoring rod is usually It is necessary to select a stable highest point (for example: the top of a mountain) as the reference point for surveying and mapping, and then use coordinate transfer to determine it; but usually the accuracy level of the reference point for surveying and mapping is low, which makes the coordinate system of each measurement system in the tailings pond inconsistent. Therefore, there will be a certain measurement error in the measured absolute height of the level meter, which will cause a large error in the measurement of the length of the dry beach of the tailings pond, and cannot accurately reflect the actual safety status of the tailings pond

[0009] (3) The sedimentary shoal formed by the tailings is in a soft state. After the monitoring rod is buried in it, it will sink or tilt due to its own weight and the weight of the level gauge, which will cause serious deviations in the measurement results; at the same time, as the sedimentary shoal The tailings gradually increase, and the monitoring poles will gradually be buried and cannot be recovered; therefore, the existing slope calculation method needs to re-bury expensive monitoring poles in stages

[0010] (4) Since most of the tailings contain corrosive substances, in the existing slope calculation method, if the power supply cable and communication cable of the level meter are buried in the ground, they will be strongly corroded, and the service life will be extremely short ; If the power supply cable and communication cable are installed in the aerial laying method, there will be serious problems such as lightning strikes, tilting of the pole, and the pole being buried when the dry beach is lifted.

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