發(fā)布時(shí)間：2018-12-11 22:25

【摘要】：煤礦粉塵不僅影響煤礦的經(jīng)濟(jì)效益,而且危害煤礦工人的身心健康。煤礦各工作面產(chǎn)塵最大的場(chǎng)所是煤礦綜采面。本文以涼水井礦42112綜采工作面為研究對(duì)象,主要針對(duì)采煤機(jī)上下滾筒,液壓支架和轉(zhuǎn)載點(diǎn)。運(yùn)用FLUENT數(shù)值模擬方法對(duì)其風(fēng)流分布規(guī)律及風(fēng)流—粉塵運(yùn)移規(guī)律進(jìn)行研究,并結(jié)合現(xiàn)場(chǎng)實(shí)測(cè)數(shù)據(jù),按不同工序模擬出的粉塵規(guī)律提出針對(duì)性的降塵措施。本論文的研究成果主要有以下幾個(gè)方面:(1)通過(guò)FLUENT數(shù)值模擬得出了綜采工作面風(fēng)流分布的規(guī)律,即風(fēng)速由于液壓支架的阻擋,在液壓支架處風(fēng)速變小,在采煤機(jī)處由于擾流作用風(fēng)速變大。(2)把綜采工作面的粉塵產(chǎn)生的來(lái)源細(xì)分為三個(gè)部分單獨(dú)進(jìn)行研究,得出了三個(gè)產(chǎn)塵源都開時(shí)綜采面的粉塵運(yùn)動(dòng)規(guī)律和粉塵濃度的分布規(guī)律,即粉塵從產(chǎn)塵源開始沿程不斷沉降,大部分粉塵被工作面和底板捕集,少部分粉塵隨風(fēng)流擴(kuò)散到人行道空間,并被排出工作面。(3)得出了采煤機(jī)單獨(dú)產(chǎn)塵時(shí),風(fēng)流—粉塵運(yùn)移規(guī)律,從機(jī)道向人行道,粉塵濃度由大變小。上滾筒割煤產(chǎn)生粉塵會(huì)運(yùn)移到人行道,下滾筒產(chǎn)生粉塵不會(huì)運(yùn)移到人行道。(4)得出了液壓支架單獨(dú)產(chǎn)塵時(shí),風(fēng)流—粉塵運(yùn)移規(guī)律,粉塵濃度沿程變小,在液壓支架下風(fēng)向10m-20m粉塵濃度影響呼吸帶,往后多數(shù)沉降于底板。(5)得出了轉(zhuǎn)載點(diǎn)單獨(dú)產(chǎn)塵時(shí),風(fēng)流—粉塵運(yùn)移規(guī)律。由于風(fēng)流的擾動(dòng),粉塵濃度先增大后減小,在轉(zhuǎn)載點(diǎn)后15m左右粉塵濃度達(dá)到最大。結(jié)合研究成果,提出了利用旋流負(fù)壓除塵風(fēng)機(jī)進(jìn)行回采工作面降塵的方式,研究結(jié)果對(duì)現(xiàn)場(chǎng)具有現(xiàn)實(shí)的指導(dǎo)意義。
[Abstract]:Coal dust not only affects the economic benefits of coal mines, but also endangers the physical and mental health of coal miners. The most dust-producing place in every coal face is the fully mechanized coal face. This paper takes 42112 fully mechanized face of Liangshui Coal Mine as the research object, mainly aiming at the top and bottom drum, hydraulic support and transfer point of coal mining machine. The FLUENT numerical simulation method is used to study the law of air flow distribution and air-flow dust migration. Combined with the field measured data, the dust reduction measures are put forward according to the dust law simulated in different working procedures. The main research results of this paper are as follows: (1) through FLUENT numerical simulation, the law of wind flow distribution in fully mechanized mining face is obtained, that is, wind speed becomes smaller in hydraulic support because of the obstruction of hydraulic support. In the coal mining machine, the wind speed increases due to disturbance. (2) the source of dust produced in fully mechanized coal mining face is subdivided into three parts. The dust movement law and dust concentration distribution law of fully mechanized coal face are obtained when the three dust sources are open, that is, the dust is continuously deposited along the process from the dust production source, and most of the dust is captured by the working face and the bottom plate. A small part of dust diffuses into the sidewalk space with the wind flow and is discharged from the working face. (3) when coal miner produces dust separately, the law of air-flow and dust migration is obtained, and the dust concentration changes from large to small from the machine road to the sidewalk. The dust produced by coal cutting in the upper drum will move to the sidewalk, but the dust produced by the lower drum will not move to the sidewalk. (4) when the hydraulic support produces dust alone, the law of air-dust migration is obtained, and the dust concentration decreases along the path. The concentration of 10m-20m dust under the hydraulic support affects the breathing zone and most of the dust deposited on the floor. (5) the law of air-flow and dust migration is obtained when the dust is produced separately at the transfer point. Due to the disturbance of the air flow, the dust concentration first increases and then decreases, and the dust concentration reaches the maximum about 15 m after the transfer point. Combined with the research results, the method of dust reduction in mining face by using swirl negative pressure dust removing fan is put forward, and the research result has practical guiding significance to the field.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD714.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 周剛;張琦;程衛(wèi)民;陳連軍;馮開林;聶文;;煤礦錨噴作業(yè)區(qū)噴漿粉塵數(shù)值模擬與新型濕噴一體機(jī)研制[J];中南大學(xué)學(xué)報(bào)(自然科學(xué)版);2016年02期

2 白若男;張琦;于海明;馬驍;陳洪濤;;綜采工作面風(fēng)速對(duì)粉塵分布規(guī)律影響的數(shù)值模擬分析[J];煤礦安全;2015年09期

3 李軍;;煤礦機(jī)電運(yùn)輸事故多發(fā)的原因分析及控制對(duì)策[J];黑龍江科技信息;2015年25期

4 郭金偉;潘志存;;綜放工作面的粉塵防治[J];內(nèi)蒙古煤炭經(jīng)濟(jì);2015年08期

5 包圖雅;;FLUENT在流體力學(xué)教學(xué)中的應(yīng)用研究[J];新課程研究(中旬刊);2015年08期

6 左前明;崔向飛;朱良;張琦;;大采高綜采工作面風(fēng)流流動(dòng)規(guī)律數(shù)值模擬分析[J];煤炭技術(shù);2015年06期

7 蔣仲安;張中意;譚聰;羅俊峰;閆鵬;;基于數(shù)值模擬的綜采工作面通風(fēng)除塵風(fēng)速優(yōu)化[J];煤炭科學(xué)技術(shù);2014年10期

8 許滿貴;劉欣凱;文新強(qiáng);何鵬程;朱兆偉;;煤礦綜采工作面粉塵分布及運(yùn)移規(guī)律研究[J];西安科技大學(xué)學(xué)報(bào);2014年05期

9 陳小勇;;煤價(jià)波動(dòng)對(duì)煤炭資源豐裕省份產(chǎn)業(yè)轉(zhuǎn)型升級(jí)的影響研究——基于樣本省份面板數(shù)據(jù)的實(shí)證分析[J];價(jià)格理論與實(shí)踐;2014年06期

10 譚聰;蔣仲安;陳舉師;王佩;;綜采割煤粉塵運(yùn)移影響因素的數(shù)值模擬[J];北京科技大學(xué)學(xué)報(bào);2014年06期

相關(guān)重要報(bào)紙文章 前1條

1 楊凱;;點(diǎn)亮塵肺病患者的希望之燈[N];中國(guó)煤炭報(bào);2013年

相關(guān)博士學(xué)位論文 前4條

1 曹維;大規(guī)模CFD高效CPU/GPU異構(gòu)并行計(jì)算關(guān)鍵技術(shù)研究[D];國(guó)防科學(xué)技術(shù)大學(xué);2014年

2 劉貴友;雙鴨山礦區(qū)綜采工作面粉塵綜合防治技術(shù)研究[D];遼寧工程技術(shù)大學(xué);2013年

3 荊德吉;基于氣固兩相流的控塵理論及其在選煤廠應(yīng)用研究[D];遼寧工程技術(shù)大學(xué);2013年

4 蔣光彪;基于DLR型k-ε模型的AMG方法對(duì)漸擴(kuò)管路內(nèi)紊流數(shù)值仿真[D];湘潭大學(xué);2009年

相關(guān)碩士學(xué)位論文 前6條

1 劉小虎;粉塵濃度測(cè)量技術(shù)研究[D];西安工業(yè)大學(xué);2013年

2 楊曉春;面向孔表面氣粒兩相強(qiáng)制環(huán)流光整加工數(shù)值模擬和實(shí)驗(yàn)研究[D];太原理工大學(xué);2011年

3 吳百劍;綜采工作面粉塵分布規(guī)律研究[D];煤炭科學(xué)研究總院;2008年

4 劉向升;綜放工作面支架噴霧降塵裝置的選擇及優(yōu)化[D];山東科技大學(xué);2007年

5 朱陽(yáng)春;三峽庫(kù)區(qū)污染擴(kuò)散三維數(shù)值模擬及其應(yīng)用研究[D];重慶大學(xué);2007年

6 吳瓊;綜采工作面噴霧降塵機(jī)理及高效降塵噴嘴改進(jìn)研究[D];遼寧工程技術(shù)大學(xué);2007年

，

本文編號(hào)：2373328