Space-time distribution detection method and detection system for coal mine fully-mechanized coal mining surface dust

Abstract

The invention provides a space-time distribution detection method and detection system for coal mine fully-mechanized coal mining surface dust. The method comprises the steps that a mining dust sampler is arranged at each measuring point, after sampling is started, the mining dust sampler at the most upstream measuring point is started to collect dust at the measuring point according to the wind direction in a fully mechanized coal mining face, and then the mining dust samplers at the subsequent measuring points are sequentially started to collect dust at the measuring points according to thewind direction of the fully mechanized coal mining face; after sampling is finished, the filter membrane is taken out in each mining dust sampler to obtain the current mass of each filter membrane andobtain the mass change value of each filter membrane according to the current mass and the initial mass of each filter membrane; the corresponding relation between the dust concentration of each measuring point and the time is further obtained in the current sampling period; and the steps are repeated to obtain the relationship of the dust concentration of each measuring point along with the timechange, thereby obtaining the dust space-time distribution result of the fully mechanized coal mining face. By means of the scheme, the evolution rule of the dust concentration at any position in thefully mechanized coal mining face along with time can be obtained.

Description

technical field [0001] The invention relates to the technical field of dust concentration detection, in particular to a method and a detection system for detecting the temporal and spatial distribution of dust in fully mechanized coal mine mining. Background technique [0002] Coal resources have always been an important energy source for all countries, especially the only strategic energy source that China can rely on and control at present. The degree of mechanization of coal mining is getting higher and higher, and the amount of dust generated is also increasing, especially in comprehensive mechanized coal mining. Referred to as fully mechanized mining face, it is one of the main sources of coal mine dust. On the one hand, the working environment polluted by coal dust seriously endangers the health of workers. Long-term inhalation of dust can cause lung disease and pneumoconiosis; on the other hand, excessive dust concentration affects the safety performance of coal minin...

AI Technical Summary

Problems solved by technology

Such a sampling method can reflect the dust concentration at the sampling point, but it cannot reflect the migration and evolution law of dust on the fully mechanized mining face, and it is difficult to judge the uneven temporal and spatial distribution of dust on the fully mechanized mining face, which has considerable limitations. The inventor Find in the process of realizing the present invention, the reason that the above-mentioned problem exists mainly is:

[0004] (1) Existing sampling is the arrangement of selecting a sampling point on the cross-section along the wind flow direction, which is difficult to reflect the spatially uneven characteristics of the dust on the cross-section;

[0005] (2) In the direction of wind flow, there is no temporal-spatial correlation between the data obtained from sampling points at different distances, and the obtained sampling data only reflects the average concentration of dust at the measurement position, and cannot reflect the diffusion and evolution of dust in the fully mechanized mining face with wind flow Happening

[0006] Therefore, the dust concentration data of fully mechanized mining work obtained by existing measurement methods has considerable limitations, and can only help the staff to understand the dust concentration at a specific time and location on the fully mechanized mining face to a certain extent, and cannot reflect the dust concentration in the fully mechanized mining face. The spatio-temporal distribution of the mining face cannot invert the diffusion, evolution, and migration of dust on the fully mechanized mining face under the effects of gravity, wind, etc.

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