本文選題：掘進(jìn)工作面 + 熱環(huán)境��； 參考：《西安科技大學(xué)》2017年碩士論文

【摘要】：隨著礦井開采深度的增加和采掘機(jī)械化程度的不斷提高,深井熱害已經(jīng)成為制約煤礦安全開采的重大問題之一,礦內(nèi)高溫環(huán)境嚴(yán)重影響井下作業(yè)人員的身體健康和生產(chǎn)效率。因此開展對(duì)高溫礦井的熱環(huán)境研究具有重要的安全意義、經(jīng)濟(jì)意義。本文針對(duì)新巨龍公司1304N掘進(jìn)工作面,利用理論分析,數(shù)值模擬,現(xiàn)場(chǎng)測(cè)試等方法對(duì)掘進(jìn)工作面熱環(huán)境進(jìn)行研究。本文首先通過實(shí)驗(yàn)測(cè)得工作面煤巖的熱擴(kuò)散系數(shù)和導(dǎo)熱系數(shù);根據(jù)現(xiàn)場(chǎng)實(shí)測(cè)數(shù)據(jù)得到圍巖與風(fēng)流的對(duì)流換熱系數(shù)、風(fēng)筒綜合換熱系數(shù)以及不穩(wěn)定換熱系數(shù);對(duì)現(xiàn)場(chǎng)熱環(huán)境參數(shù)進(jìn)行測(cè)定,得到進(jìn)風(fēng)、回風(fēng)風(fēng)流焓值變化規(guī)律;然后分析掘進(jìn)工作面圍巖內(nèi)部溫度分布以及巷道風(fēng)流場(chǎng)分布數(shù)學(xué)模型,建立了合適的物理模型,利用FLUENT軟件對(duì)掘進(jìn)工作面圍巖內(nèi)部溫度分布以及工作面熱環(huán)境分布進(jìn)行了數(shù)值模擬,并利用空氣齡和PMV-PPD指標(biāo)對(duì)掘進(jìn)工作面熱環(huán)境進(jìn)行評(píng)價(jià)。利用數(shù)值模擬分析不同因素對(duì)工作面熱環(huán)境的影響,對(duì)比不同條件下工作面溫度場(chǎng)、速度場(chǎng)、空氣齡和PMV-PPD分布情況,根據(jù)數(shù)值模擬的結(jié)果,建立基于粒子群算法(PSO)尋優(yōu)的支持向量機(jī)(SVM)掘進(jìn)工作面熱環(huán)境預(yù)測(cè)模型;然后在對(duì)掘進(jìn)工作面進(jìn)行熱源分析的基礎(chǔ)上,利用能量守恒推導(dǎo)出需冷量的計(jì)算公式,并分析工作面需冷量與熱源散熱之間的關(guān)系,計(jì)算出1304N掘進(jìn)工作面需冷量為580.5kW,據(jù)此給出工作面空冷器額定制冷量選擇的合理建議;根據(jù)對(duì)不同空冷器安裝位置進(jìn)行模擬,分析其對(duì)工作面制冷降溫的影響。研究表明:圍巖溫度場(chǎng)受送風(fēng)溫度以及風(fēng)量的影響,一定范圍內(nèi),溫度大小決定換熱量多少,風(fēng)量大小決定換熱能力大小;送風(fēng)溫度、送風(fēng)量、與迎頭距離對(duì)掘進(jìn)工作面熱環(huán)境都有一定影響,降低送風(fēng)溫度能夠有效的改善熱環(huán)境,增大風(fēng)量對(duì)熱環(huán)境影響有限,增大過度甚至有負(fù)效果,理論上距離迎頭越近,工作面熱環(huán)境越好,考慮實(shí)際情況5-8m比較合適;基于SVM模型的熱環(huán)境預(yù)測(cè)結(jié)果表明,該模型預(yù)測(cè)精度高,運(yùn)算快,是一種比較科學(xué)的模型,可以用于熱環(huán)境的預(yù)測(cè)。將1臺(tái)制冷量為250kW的空冷器布置在距離迎頭350m-200m范圍,就能夠能夠使1304N工作面有較好的降溫效果。
[Abstract]:With the increase of mining depth and the increasing mechanization of mining, the heat damage of deep well has become one of the major problems that restrict the safety mining of the coal mine. The high temperature environment in the mine seriously affects the health and efficiency of the workers in the underground mine. Therefore, it is of great safety significance to carry out the research on the thermal environment of the high temperature mine. In this paper, the thermal environment of the heading face is studied by means of theoretical analysis, numerical simulation, field test and so on. The thermal diffusivity and thermal conductivity of coal rock in the working face are measured by experiments, and the convective heat transfer coefficient of the surrounding rock and the wind flow is obtained according to the actual measured data in the 1304N heading face of the new giant dragon company. The overall heat transfer coefficient and the unstable heat transfer coefficient of the wind tunnel are measured. The parameters of the thermal environment are measured, and the change law of the enthalpy of the air flow and the air flow is obtained. Then the temperature distribution in the surrounding rock and the mathematical model of the distribution of the tunnel wind field are analyzed, and a suitable physical and physical model is set up, and the surrounding rock of the heading face is used by the FLUENT software. The internal temperature distribution and the thermal environment distribution of the working face are simulated, and the thermal environment of the heading face is evaluated using the age of air and the PMV-PPD index. The influence of different factors on the thermal environment of the working face is analyzed by numerical simulation, and the distribution of temperature field, velocity field, air age and PMV-PPD distribution under different conditions is compared. The results of the numerical simulation are based on the particle swarm optimization (PSO) optimization support vector machine (SVM) thermal environment prediction model for the driving face. Then, on the basis of the heat source analysis of the heading face, the calculation formula of the cooling capacity is derived from the conservation of energy, and the relationship between the cooling capacity of the working face and the heat dissipation of the heat source is analyzed, and 13 of the calculation is calculated. The cooling capacity of the 04N heading face is 580.5kW. According to this, a reasonable suggestion for selecting the cooling capacity of the air cooler is given. According to the simulation of the installation position of the different air cooler, the influence on the cooling and cooling of the working face is analyzed. The study shows that the temperature field of the surrounding rock is influenced by the temperature of the air supply and the air volume, and the temperature is determined to change within a certain range. The amount of heat, the size of the air volume determines the heat transfer capacity, the air supply temperature, the air supply volume and the head-on distance have a certain influence on the thermal environment of the heading face. Reducing the air supply temperature can effectively improve the thermal environment, the increase of the air volume has limited effect on the thermal environment, the increase of excessive even negative effect, the closer to the head-on, the thermal environment of the working face. The better, considering the actual situation 5-8m is more suitable. The thermal environment prediction results based on the SVM model show that the model has high prediction accuracy and fast operation. It is a relatively scientific model and can be used in the prediction of the thermal environment. The 1 air-cooled air coolers with 1 refrigerating quantities at the range of head-on 350m-200m can make the 1304N working face better. The effect of cooling.
【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)】：TD727.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 白洋;賈進(jìn)章;;利用FLUENT研究礦井干燥巷道圍巖對(duì)風(fēng)流傳熱[J];遼寧工程技術(shù)大學(xué)學(xué)報(bào)(自然科學(xué)版);2015年01期

2 姬建虎;廖強(qiáng);胡千庭;褚召祥;張習(xí)軍;;掘進(jìn)工作面沖擊射流換熱特性[J];煤炭學(xué)報(bào);2013年04期

3 孫勇;王偉;;基于Fluent的掘進(jìn)工作面通風(fēng)熱環(huán)境數(shù)值模擬[J];煤炭科學(xué)技術(shù);2012年07期

4 向立平;王漢青;;掘進(jìn)巷道熱環(huán)境與通風(fēng)效率數(shù)值模擬研究[J];安全與環(huán)境學(xué)報(bào);2012年01期

5 李艷波;黃壽元;李剛;張永剛;;抽出式局部通風(fēng)掘進(jìn)面熱環(huán)境數(shù)值模擬研究[J];中州煤炭;2011年09期

6 樊小利;張學(xué)博;;圍巖溫度場(chǎng)及調(diào)熱圈半徑的半顯式差分法解算[J];煤炭工程;2011年07期

7 黎明鏡;;深井巷道圍巖溫度場(chǎng)分布規(guī)律研究[J];山西建筑;2010年12期

8 高建良;何權(quán)富;張學(xué)博;;礦井巷道對(duì)流換熱系數(shù)的現(xiàn)場(chǎng)測(cè)定[J];中國安全科學(xué)學(xué)報(bào);2010年02期

9 孟凡英;車廣路;;基于CFD技術(shù)的掘進(jìn)巷道溫度場(chǎng)模擬[J];中國科技信息;2009年24期

10 向立平;王漢青;;高溫高濕礦井人體熱舒適數(shù)值模擬研究[J];礦業(yè)工程研究;2009年03期

相關(guān)博士學(xué)位論文 前1條

1 張?jiān)?高地溫巷道圍巖非穩(wěn)態(tài)溫度場(chǎng)及隔熱降溫機(jī)理研究[D];中國礦業(yè)大學(xué);2013年

相關(guān)碩士學(xué)位論文 前4條

1 崔超;深部礦井熱害及掘進(jìn)工作面熱環(huán)境研究[D];昆明理工大學(xué);2016年

2 湯民波;掘進(jìn)工作面壓入式通風(fēng)風(fēng)流流場(chǎng)數(shù)值模擬研究[D];江西理工大學(xué);2013年

3 王偉;礦井局部熱害快速蒸發(fā)冷卻技術(shù)的研究[D];山東科技大學(xué);2009年

4 龍騰騰;高溫獨(dú)頭巷道射流通風(fēng)熱環(huán)境數(shù)值模擬及熱害控制技術(shù)研究[D];中南大學(xué);2008年

，

本文編號(hào)：1965146