Microwave irradiation-infrared detection coal and waste rock recognition device

Abstract

A microwave irradiation-infrared detection coal and waste rock recognition device comprises a microwave transmitting device, infrared thermal imagers and data processing controllers, wherein the microwave transmitting device is arranged behind top coal caving hydraulic supports of a fully mechanized caving face; the infrared thermal imagers are mounted on the rear side of the microwave transmitting device; the transmitting direction of the microwave transmitting device and the detection directions of the infrared thermal imagers face the rear part of the top coal caving hydraulic supports of the fully mechanized caving face; and the microwave transmitting device and the infrared thermal imagers are connected with the data processing controllers through control cables. According to the microwave irradiation-infrared detection coal and waste rock recognition device, microwave irradiation is performed at first to increase the temperature difference between coal and waste rock, so that the difference between coal and waste rock is increased to facilitate accurate recognition of coal and waste rock, and the advantages of high speed, accuracy and reliability are achieved; and as a microwave transmitter is arranged in a mounting box, favorable safety and dust prevention roles are played.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety production, and in particular relates to a microwave irradiation-infrared detection coal and gangue identification device. Background technique [0002] The identification method of coal and gangue is an important factor affecting the recovery rate of the top coal of fully mechanized caving face. The current control of the coal-drawing process mainly relies on the underground coal workers, through manual visual inspection and hearing, and in accordance with the principle of "seeing the gangue and closing the door". Due to the influence of factors such as large dust in fully-mechanized caving flour, low visibility, and many underground noises, this judgment method has great inaccuracy and human subjectivity. There is bound to be under-discharging or over-discharging of the top coal. Under-discharging will result in loss of coal, resulting in a reduction in the coal recovery rate of the wor...

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Problems solved by technology

[0002] The identification method of coal and gangue is an important factor affecting the recovery rate of the top coal of fully mechanized caving face. The current control of the coal-drawing process mainly relies on the underground coal workers, through manual visual inspection and hearing, and in accordance with the principle of "seeing the gangue and closing the door". Due to the influence of factors such as large dust in fully mechanized caving flour, low visibility, and many underground noises, this judgment method has great inaccuracy and human subjectivity

There must be under-discharging or over-discharging of the top coal. Under-discharging will result in loss of coal, resulting in a reduction in the coal recovery rate of the working face; over-discharging will cause a large amount of gangue above the coal seam to be released, resulting in a decline in coal quality and increased transportation and washing costs.

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