Application of foam to suppress rock dust in a large cross-section rock roadway driven with roadheader
Application of foam to suppress rock dust in a large cross-section rock roadway driven with roadheader
复制标题
泡沫抑制岩尘在掘进机掘进大断面岩巷中的应用
DOI：
10.1016/j.apt.2012.06.012
复制
发表时间：
2013-01-01
影响因子：
5.2
通讯作者：
Zhang, Yikun
中科院分区：
文献类型：
--
作者：
Wang, Hetang;Wang, Deming;Zhang, Yikun
岩巷掘进工作面岩尘的最大来源是掘进机。过量吸入可吸入的岩石粉尘可能对掘进机操作员和其他工人造成严重的健康危害。位于中国东部朱仙庄地下煤矿的一条岩巷，名为北带主巷（NBME），正在由EBZ 318 H掘进机掘进。巷道断面为15.84m2，掘进工作面呼吸性岩尘浓度高，针对岩巷掘进机粉尘产生特点，进行了泡沫防尘研究。本文提出了一种新的泡沫制备系统和应用方法，并通过对井下掘进机操作人员附近两点粉尘浓度的测量，评价了泡沫的抑尘效果，结果表明，泡沫能显著降低岩尘浓度。掘进机作业工人呼吸性粉尘暴露量由540.2mg/m3降至84.3mg/m3，降尘效率达84.4%。此外，掘进工作面的能见度和环境也得到了显著改善。结果表明，泡沫对岩尘的捕集效率有明显的提高，并避免了常规水喷雾捕集岩尘的主要缺陷。(C)2012年日本粉末技术学会。由Elsevier B. V.和日本粉末技术协会出版。All rights reserved.
The greatest source of rock dust on rock roadway heading face is the roadheader. Overexposure to respirable rock dust can be a serious health hazard to roadheader operators and other workers. One of the rock roadways, named North Belt Main Entry (NBME), belonging to the underground coal mine Zhuxianzhuang, located in east China, is being driven by the EBZ318H roadheader. The cross-section of the roadway is 15.84 m(2), and the heading face has a high concentration of respirable rock dust.This paper presents a study of rock roadheader dust control by foam, taking into account the dust generation characteristics. A new foam preparation system and application method has been proposed and the dust suppression effect of foam has been assessed by dust concentration measurements taken at two points next to the roadheader operator in the previously mentioned underground coal mine.The results have shown that the foam dramatically reduced the rock dust concentrations. The roadheader operator's respirable dust exposures were lowed from 540.2 mg/m(3) to 84.3 mg/m(3), and the dust suppression efficiency reached 84.4% on the NBME heading face. In addition, the visibility and environment of the heading face was significantly improved. It is concluded that the foam showed a significant improvement on the rock dust capture efficiency, and avoided the main deficiencies of conventional water sprays. (C) 2012 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.