【摘要】：為確定爆破掘進(jìn)面粉塵運(yùn)移規(guī)律及設(shè)計(jì)1100工作面防塵系統(tǒng),開展風(fēng)流分布、粉塵擴(kuò)散、沉降及濃度時(shí)間變化實(shí)驗(yàn)。1：1建立幾何模型,劃分并修改計(jì)算網(wǎng)格,優(yōu)選了RNG k-ε湍流模型,經(jīng)CFD軟件模擬得到至工作面距離L=0-60 m內(nèi)粉塵運(yùn)移規(guī)律：巷道風(fēng)速隨L遞增先升高而后降低；粉塵濃度隨垂高在0.5-4 m內(nèi)遞增而逐漸降低,隨L遞增先升高而后降低：粒徑為10μm以下粉塵均勻分布于空間,沉降量隨L遞增呈“減少-增高-減少-增高”趨勢(shì),10-200μm之間沉降量隨L遞增呈“減少-增高-減少”趨勢(shì),且90-200μm粉塵幾乎完全沉降；爆破初期5 min內(nèi),沿程粉塵濃度急劇下降,10-50 min內(nèi)下降趨勢(shì)平緩,高濃度區(qū)長(zhǎng)時(shí)間在L=40 m之內(nèi),不沿巷道運(yùn)移。L=10-20 m為風(fēng)筒射流渦旋區(qū),粒徑為10-200μm沉降量偏少,粉塵濃度長(zhǎng)時(shí)間較高。選用水霧與除塵風(fēng)機(jī)聯(lián)合控塵,在L=24m、29m、34m處布置三組噴霧裝置形成水幕抑制粉塵擴(kuò)散,風(fēng)筒吸風(fēng)口在L=15 m,于流場(chǎng)渦流中心形成負(fù)壓出口,更有利于空氣抽吸凈化。
[Abstract]:In order to determine the law of dust movement in blasting tunneling face and to design dust control system in 1100 working face, experiments of air flow distribution, dust diffusion, sedimentation and time variation of concentration are carried out. A geometric model is established at 1:1, and the calculation grid is divided and modified. The RNG k- 蔚 turbulence model is selected, and the dust migration law within 0 ~ 60 m from the working face is obtained by CFD simulation: the wind speed of roadway increases first with the increase of L and then decreases; The dust concentration decreased gradually with the vertical height increasing within 0.5-4 m, and then decreased with the increase of L. The dust particle size below 10 渭 m distributed uniformly in space, and the deposition showed the trend of "decrease-increase-decrease-increase" with the increase of L. The deposition between 10-200 渭 m and 90-200 渭 m is almost completely deposited. During the first 5 min of blasting, the dust concentration along the course decreased sharply, and the decreasing trend was gentle within 10-50 min. The concentration of dust in the high concentration area was within 40 m long and did not move along the roadway. L10 ~ (-20 m) was the vortex area of the tuyere jet, and the settling amount of 10 ~ (-200) 渭 m was small. The dust concentration is high for a long time. In this paper, water mist and dust collecting fan are used to control dust, three groups of spray units are arranged at the place of 24m ~ 29m ~ (34 m) to form water curtain to restrain dust diffusion, and the air suction outlet is 15 m, and negative pressure outlet is formed in the swirl center of the flow field, which is more favorable for air suction and purification.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TD714.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 蔣仲安;陳梅嶺;陳舉師;;巷道型采場(chǎng)爆破粉塵質(zhì)量濃度分布及變化規(guī)律的數(shù)值模擬[J];中南大學(xué)學(xué)報(bào)(自然科學(xué)版);2013年03期

2 蔣仲安;陳舉師;王晶晶;牛偉;高楊;;膠帶輸送巷道粉塵運(yùn)動(dòng)規(guī)律的數(shù)值模擬[J];煤炭學(xué)報(bào);2012年04期

3 周茂普;;綜掘工作面通風(fēng)除塵系統(tǒng)研發(fā)與應(yīng)用[J];煤炭科學(xué)技術(shù);2009年10期

4 趙振保;;磁化水的理化特性及其煤層注水增注機(jī)制[J];遼寧工程技術(shù)大學(xué)學(xué)報(bào)(自然科學(xué)版);2008年02期

5 何正勇;程國(guó)軍;戴廣龍;;煤巷綜掘工作面煤層注水防塵技術(shù)[J];煤礦安全;2007年01期

6 王繼峰;;爆破掘進(jìn)工作面千克炸藥需風(fēng)量初探[J];煤礦爆破;2006年04期

7 張小艷,郭強(qiáng),李全;微細(xì)水霧除塵技術(shù)的實(shí)驗(yàn)研究[J];環(huán)境污染與防治;2003年04期

8 鄭炳旭,魏曉林;城市爆破拆除的粉塵預(yù)測(cè)和降塵措施[J];中國(guó)工程科學(xué);2002年08期

9 劉雅俊,葛少成,鄭丹;風(fēng)幕集塵風(fēng)機(jī)的研究[J];遼寧工程技術(shù)大學(xué)學(xué)報(bào)(自然科學(xué)版);2001年01期

10 徐景德,周心權(quán);有源巷道中粉塵運(yùn)移與濃度分布規(guī)律的實(shí)驗(yàn)研究[J];湘潭礦業(yè)學(xué)院學(xué)報(bào);1999年02期

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