Silt thickness measurement method for lead-zinc ore suction well based on parameter estimation

Abstract

The invention discloses a silt thickness measurement method for a lead-zinc ore suction well based on parameter estimation, and the method comprises the following steps: collecting an echo signal in the suction well through a signal collecting device, denoising the collected signal, extracting features, and establishing a classifier for classification; using different mathematical models to estimate parameters of the corresponding signals, estimating an ultrasonic propagation time parameter, and calculating the thickness of the well bottom silt through using the ultrasonic propagation time parameter in combination with the propagation speed of an ultrasonic wave in water. The method is different from a threshold method used in the conventional ultrasonic measurement, can effectively avoidan interference item in an echo, and enables a measurement result to be more precise.

Description

technical field [0001] The invention belongs to the field of ultrasonic detection, and in particular relates to a method for measuring the thickness of mud in an underground water absorption well of a lead-zinc mine. Background technique [0002] The safety of mine drainage is an important factor affecting the safe production of mining areas. Underground drainage is very important to the safety of underground workers and equipment, and is the most basic condition for underground operations. Due to underground mining and other reasons, the water in the well is relatively turbid. After the water accumulates in the water absorption well, it is easy to generate silt in the water absorption well. At present, the water level measurement device of the suction well is an ultrasonic liquid level gauge, which gives the liquid level height by measuring the distance between the probe and the liquid level surface. This measurement method ignores the thickness of the mud deposited at the ...

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Problems solved by technology

[0004] Ultrasonic ranging is based on the reflection signal generated when the ultrasonic signal encounters the measured object, and the distance between the ultrasonic probe and the measured object can be estimated according to the echo signal. At present, most ultrasonic ranging uses the threshold method to estimate the ultrasonic propagation time. In lead In the underground water absorption well of zinc mine, there are interferences of heavy metal particles and other underground impurities, and it is difficult to obtain accurate information by using the traditional threshold method

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