Bracket spraying dust fall device used for fully mechanized caving coal mine working face

Abstract

The invention provides a bracket spraying dust fall device used for a fully mechanized caving coal mine working face, which comprises a fully mechanized bracket of the coal mine working face. The fully mechanized bracket of the coal mine working face is sequentially provided with a forestope spraying structure, a front spraying structure among brackets, a back spraying structure among brackets and a caving spraying structure, wherein the forestope spraying structure, the front spraying structure among brackets, the back spraying structure among brackets and the caving spraying structure are used for simultaneouslyspraying to form a full section dust fall region of the fully mechanized bracket of the coal mine working face. The forestope spraying structure, the front spraying structure among brackets, the back spraying structure among brackets and the caving spraying structure are scientifically and reasonably arranged on the fully mechanized bracket of the coal mine working face to ensure that the dust fall region is formed on a full section of the coal mine working face, therefore, the dust fall range is expanded, the dust fall efficiency is improved, and the high concentration dust generated in the underground production process of a coal mine is effectively decreased.

Description

technical field [0001] The invention relates to a dust suppression device used in coal mines, in particular to a bracket spray dust suppression device used in fully mechanized caving working faces of coal mines. Background technique [0002] The dust concentration of the coal mining face has been greatly exceeding the operating standard, which seriously affects the health of the workers. The dust concentration generated when the shearer cuts, moves, and discharges coal in the coal mining face is as high as 5000-6000mg / m 3 In some coal mines, the original total dust concentration is even as high as 8000-10000mg / m 3 , greatly exceeding the national standard, seriously polluting the working environment. Excessive dust concentration can easily cause gas and coal dust explosion accidents, seriously threaten the safe and efficient production of coal mining enterprises, and cause huge economic losses. In addition, workers are prone to occupational pneumoconiosis due to long-term...

AI Technical Summary

Problems solved by technology

Most of the problems in the existing spray dust suppression methods and spray equipment layout are that the dust suppression efficiency is not high, and the settling rate of respirable dust and whole dust is low

The main reason is that the parameters of the spray system and the structure of the spray device are unreasonable, which affects the effect of spray dust reduction, while the selection of atomizer nozzles for the fully mechanized caving face is mainly based on people's practical experience and subjective selection

That is, according to the dust particle size characteristics of different production processes, what type of nozzles can be used to achieve a better dust reduction effect. It is difficult to control the dust concentration of the coal mine working face only by subjective experience.

In particular, the hydraulic support spray system of fully mechanized caving working face currently mainly includes two parts: the spraying of the front probe beam and the spray of the coal outlet, and the spray rod of the front probe beam is perpendicular to the floor of the working face, which not only affects the safe passage of the shearer, Moreover, it is very easy to scratch the workers walking on the support platform, and according to the survey, the total dust suppression efficiency of the spraying form of the fully-mechanized support is only 50-60%; the dust suppression efficiency of respirable dust is only 20-30%, and the existing spray arrangement is far away Can not meet the standard concentration requirements

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