Dust preventing device of machine digging surface and dust preventing method

Abstract

The invention discloses a dust preventing device of a machine digging surface and a dust preventing method. The dust preventing device comprises a tunneling machine head spray and a crushing transfer system spray, wherein a wrapping type spray device is arranged at the back end of a tunneling machine head; the front end of the tunneling machine head is exposed outside the wrapping type spray device; the wrapping type spray device comprises an inner steel pipe and an outer steel pipe sleeving the tunneling machine head; and eight mixing type nozzles containing X-shaped diversion core wide-angle spiral openings are evenly arranged between the inner steel pipe and the outer steel pipe for forming a spherical dust reducing area wrapping a tunneling surface head. As for the dust generation of a crushing transfer system, a dust hood is arranged at the joint of a bridge type transfer machine and a belt conveyer outside a crusher, so as to control dust in an all-closed manner; on the other hand, the efficient dust capture is performed by all-aspect and multi-angle atomization nozzles; and in addition, more comprehensive dust preventing measures are formed on the machine digging surface by combining chemical dust removing technology with air curtain dust isolating technology, so that the dust concentration of the machine digging surface is reduced below 10 mg / m3, and the operation environment of workers is greatly improved.

Description

technical field [0001] The invention relates to the field of underground dust prevention in coal mines, and relates to a dust prevention device and a dust prevention method for a machine excavation working face. Background technique [0002] Since the introduction of the first roadheader in my country in the 1960s, the degree of mechanization of coal mines in my country has become higher and higher, and roadheaders have been widely used in coal mines in my country. Especially in recent years, the rapid popularization of high-power roadheaders has accelerated The development of fully mechanized excavation technology in our country. While the fully mechanized excavation technology increases the excavation speed of the machine-excavated working face, it also leads to a sharp increase in the dust concentration of the working flour. According to the actual measurement, the average dust concentration of the machine excavation face is close to 1000mg / m without any dust prevention m...

AI Technical Summary

Problems solved by technology

Such a high concentration of dust will reduce the labor productivity of the miners, affect the output and benefits of the mine, and lead to the death of miners suffering from pneumoconiosis that cannot be cured for a long time, or cause dust explosions, causing heavy casualties and economic losses. Serious threat to production safety and miners' physical and mental health

[0003] At present, in response to the problem of high flour dust concentration in machine-driven excavation work, various production mines have adopted dust prevention and control measures such as spraying outside the roadheader, dust removal fan dust suction, foam dust removal, etc., but the effect is not ideal. It can form a relatively simple and practical mine comprehensive dust control method

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