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Monitoring and measuring method for dust concentration in working faces in underground coal mine

A technology of dust concentration and working surface, which is applied in the direction of measuring device, suspension and porous material analysis, particle suspension analysis, etc., can solve the problems that are difficult to meet the online monitoring of environmental protection and safety production, and achieve comprehensive dust prevention measures and monitoring Easy to implement and low cost

Active Publication Date: 2013-03-27
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

Difficult to meet the growing requirements of environmental protection and safety production on-line monitoring

Method used

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  • Monitoring and measuring method for dust concentration in working faces in underground coal mine

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Embodiment Construction

[0018] (1) Divide the degraded images acquired by the video surveillance system into a group of square areas with the same area, set each square area to have the same depth, and the transmittance is a constant in each square area. The phase function of each square area is approximately constant, and the pixel block RGB three channels of each square area are minimized at the same time to obtain a rough transmission map with block effect;

[0019] (2) Refining the rough transmission map obtained in step (1). The refinement process is to use the energy minimization process to the equation formed by the rough transmission map, Laplacian patch matrix, identity matrix and normalization parameters, so as to realize the refinement of the rough transmission map, wherein Laplacian The Steinian patching matrix is ​​composed of the Kronecker function and the mean value and covariance matrix of the window of the transmission map to be repaired. The rough transmission map after patching can...

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Abstract

The invention provides a monitoring and measuring method for dust concentration in working faces in an underground coal mine, and the method overcomes the problems of a slow speed in sampling dust, complicated sampling and incapability of satisfying requirements of safe production on-line monitoring in the prior art. The monitoring and measuring method comprises the following steps: (1) acquiring a rough transmission diagram having a blocking effect based on a degraded image in a working face dust environment; (2) carrying out refined processing on the rough transmission diagram so as to obtain transmissivity corresponding to each pixel point in the diagram; (3) calculating an absorption factor and a scattering factors, calculating an absorption coefficient and a scattering coefficient, and calculating an extinction coefficient; (4) measuring the length of a radiation channel; (5) calculating mass concentration of dust and a changing process of dust concentration based on the transmissivity, the extinction coefficient and radiation length. The beneficial effects of the invention are as follows: rapid measuring is realized; the requirement for real time dynamic measurement is met; the method is of important significance for implementation of corresponding dustproof measures in the underground coal mine. Appropriate dedusting methods can be employed according to different environments when distribution and motion rules of dust in coal mining working faces are mastered.

Description

technical field [0001] The invention relates to a method for monitoring and measuring dust concentration in coal mines. In particular, it is a method for monitoring the dust distribution and movement law of super-large mine fully mechanized mining, fully mechanized excavation face, and roadway. Background technique [0002] With the continuous upgrading of high-efficiency fully mechanized mining equipment, the mining technology and process have been continuously improved. With the improvement of the mechanization degree of super-large mine operation points, the generation of working flour dust is also greatly increased. The temporal and spatial distribution of coal dust is quite complicated. Although there are a variety of dust reduction technologies and measures that have played a certain role in dust prevention and control, due to the lack of quantitative analysis of fully mechanized mining, fully mechanized excavation working faces, roadway air flow distribution and dus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/06
Inventor 刘丹丹赵灿汤春瑞
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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