High-efficiency dust fall device and method of underground coal mine fully-mechanized excavating tunnel

Abstract

The invention discloses a high-efficiency dust fall device and method of an underground coal mine fully-mechanized excavating tunnel. The device mainly comprises a high-efficiency heading machine spray dust fall module, a belt conveyor spray dust fall module and an automatic air return way spray dust fall module, wherein the high-efficiency heading machine spray dust fall module comprises an oil pressure-water pressure conversion device and a wind / water combined spraying device; the belt conveyor spray dust fall module comprises a coal transport automatic spray device; the automatic air return way spray dust fall module comprises a dust over-limit automatic spray dust fall device. Dust at a cutting head of a fully-mechanized excavating machine, a coal belt conveying part and an air return way is effectively controlled, dust generated in the process of operating on a fully-mechanized excavating working face can be effectively reduced, and the device is low in cost, safe and reliable and has important practical significance for controlling the incidence of dust phthisis and coal-dust explosion accidents, intensifying coal mine labor protection, realizing safe and civilized production and accelerating continuous and stable development of coal industry.

Description

technical field [0001] The invention belongs to the technical field of coal mine engineering, and relates to a high-efficiency dust suppression device and method for fully mechanized tunneling in underground coal mines. Background technique [0002] In the process of coal mine production, dust is one of the major disasters that plague safe production. Dust production is an inherent characteristic of the coal crushing process. The operation process of the roadheader excavating the roadway is a dust-producing process, and the roadway excavation has a long ventilation distance, so the dust is not easy to remove. It not only seriously affects the production safety of coal mines, but also seriously threatens the health of miners. Dust generated during roadway excavation, if dust prevention measures are not taken, will cause workers to suffer from silicosis or coal lung disease, and may even lead to coal dust explosion accidents, directly affecting mine safety and profitability. ...

AI Technical Summary

Problems solved by technology

Through investigation, it is found that the common problems of the existing roadheader spray dust suppression methods and dust suppression equipment in my country are that the dust suppression efficiency is not high, and the settling rate of respirable dust and whole dust is low

Among them, the dust removal of the dust collector has a high dust removal efficiency, but the dust removal of the dust collector has a high one-time investment, high operation and maintenance costs, large volume, heavy, and high requirements for the surrounding environment. The amount is small, and the dust suppression efficiency is also good, widely used in today's belt transportation system

In the past, manual spraying was used for spraying and dust reduction on belt conveyors, but when to turn on the spraying, who is responsible for switching on and off the spraying, the responsibility has never been fulfilled, resulting in abnormal use

Therefore, there are problems that the spray cannot be opened in time during transportation, and the dust reduction effect is not good; when the belt stops running (or there is no coal), it is not closed in time, causing the belt to slip, and the coal bunker runs out of the warehouse because it does not run out of coal.

[0007] After the coal mine has controlled the dust source and the dust generated in the process of coal transportation, there is still dust in the return air flow of the fully mechanized excavation working face, and the purification water curtain is installed in the return air roadway of the coal mining working face according to the regulations. To purify the air flow and improve the labor hygiene conditions in the workplace, but when to turn on the spray, who is responsible for switching the spray, the responsibility has never been fulfilled, resulting in abnormal use and poor dustproof effect

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