Research and application of grading dust suppression system on comprehensive heading faces

doi:10.16265/j.cnki.issn1003-3033.2019.09.024

Abstract

Abstract: In order to solve shortcomings of dust removal technology in coal mining production process and reduce threats of excessive dust on workers' occupational health, firstly, analysis was made on current status of underground dust removal, through which it was found that the main reasons for current low dust removal efficiency are nozzles' tendency to be blocked, incomplete dust source coverage, effects of head wind flow on water mist and poor insulation effects of dust curtains. Secondly, based on dust generation characteristics of different areas and dust migration law, a regional grading dedusting system was proposed which consisted of a ring wrapped dust suppressor, an air curtain dust blasting knife and a double atomization device that respectively controlled dust in the front, middle and back regions of a comprehensive face. Finally, system device was applied on comprehensive face of 26 belt lane of Zhangcun Coal Mine to test dust removal effects. The results show that total dust and respirable dust suppression efficiency in working areas both reaches up to 95%, which is about 40% higher than that of current dust removal measures, basically making dust-free working areas possible.

Key words: coal mine, comprehensive heading face, dust mass concentration, dust removal system, dust spray device, air curtain

CLC Number:

X936

HUANG Yisheng, HU Shengyong, SHAO He, LIAO Qi, GAO Yang, HU Fei. Research and application of grading dust suppression system on comprehensive heading faces[J]. China Safety Science Journal, 2019, 29(9): 150-154.

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