第4期
第44卷
2017年8月
矿业安全与环保
MINING SAFETY & ENVIRONMENTAL PROTECTION
场万钧，才庆样.露天矿内粉尘聚集机理及影响因素分析[J].业安全与环保,2017,44(4);95-98 文章编号：10084495(2017)04009504
露天矿内粉尘聚集机理及影响因素分析
汤万钓"2，才庆祥1,2
（1.中国矿业大学矿业工程学院，江苏徐州221116；
2.中国矿业大学煤炭资源与安全开采国家重点实验室，江苏徐州221116）
Vol. 44 No. 4 Aug.2017
摘要：采用计算流体力学等方法，研究了露天矿矿坑几何尺寸特点和逆温现象对露天矿粉尘聚集的影响。研究结果表明：逆湿现象阻碍了露天矿矿坑内产生的粉尘向外扩散，是露天矿粉尘污染高发的重要原因；逆湿现象的形成机理能较好地解释露天矿粉尘浓度冬春季高而夏秋季低的现象；利用 Froude数评价逆湿现象对露天矿粉尘扩散的影响，通过敏感性分析可以得出逆湿强度是决定露天矿粉尘聚集最主要的影响因素；当逆温现象多发导致矿坑内粉尘扩傲不出去时，仅降低某作业环节的粉尘排放量不能遵免矿坑粉尘污染的发生。治理露天矿粉尘污染需要从全矿角度出发，结合逆温现象的特点来重新安排矿区整体的降尘抑尘作业，才能控制粉尘浓度的升高。
关键词：露天矿；粉尘污染：逆温现象；绿色开采
中图分类号：TD824;TD714
文献标志码：A
网络出版时间：2017-08-0314：45
网络出版地址:http://kns.cnki.net/kcms/detail/50.1062.TD.20170803.1445.044.html
AnalysisonDustAccumulationMechanismandInfluencingFactorsin
Open Pit Mine
TANG Wanjun'-2, CAI Qingxiang2
( I. School of Mining Engineering , China Unirersity of Mining and Technology', Xuzhou 221116, China;
2. Sate Ke Laboratory of Coal Resotrces and Mine Safefy, China Uninersity of Miningand Technology, Xuzhou 22JJJ6, China
Abstract : In this paper, study was carried out on the influence of the geometric characteristics and temperature inversion of the open pit mine upon its dust accumulation by using the method of computational fluid mechanics. The study results showed that the temperature inversion phenomenon hindered the outward difusion of the dust generated in the open pit mine, and this
n pit mine; the formatio
was an important cause of dust pollution in the open
explain the phenomenon why the dust concentraion in the
and autumn; the Froude numbe
can be
vaua
open pit mine, and based on the sensitivity analysis, it c.
influence factor determining the dust diffusio
n mechanism of the temperature inversion can better
pit mine was high in the winter and spring and low in the summer
emu
temperature inversion on the dust diffusion in the
oncluded that the temperature inversion strength was the main
in the open pit min
when frequent temperature inversion caused the dust in open
pit mine to hardly spread out, only reducing dust discharge of a certain operation link can not avoid the mine dust pollution. So the control of dust pollution in the open pit mine needs to proceed from the perspective of the whole mine and rearrange the dust suupression operation according to the temperature inversion characteristics so that the increase of dust concentration can bx controlled.
Keywords : open pit mine; dust pollution; tempreture inversion; green mining
从露天矿生产作业特点分析，穿爆采运排各个收稿日期：201612-06;2017-06-19修订
基金项目：国家自然科学基金项目（51034005）；国家重点研发计划项目（2016YFC0501100）
作者简介：万钧（1988一），男，博士，研究方向为露天
矿绿色开采。Email;mztwj@126.com。万方数据
生产环节都会产生大量粉尘[1-2]。由于露天矿坑是散口的，当矿坑内空气能与坑外大气自由流动时，矿坑内的粉尘会随之扩散出去，不会在矿坑内聚集，矿坑内的空气质量较好；当矿坑内外空气不能自由流动时，矿坑内不断产生的粉尘不容易扩散出去而在矿坑内聚集(3)，矿坑内的空气质量会迅速恶化，形成
95·