【摘要】：隨著礦井開采的不斷延伸，井巷圍巖放熱成為礦井熱害的主導(dǎo)因素。深部巖體富含大量空隙，當(dāng)有地下水滲流時(shí)，會(huì)改變巖體溫度場(chǎng)分布，進(jìn)而影響巷道內(nèi)風(fēng)流溫度場(chǎng)，影響井下工作環(huán)境。因此，地下水滲流作用下的巷道圍巖與巷道內(nèi)風(fēng)流溫度場(chǎng)研究，對(duì)進(jìn)一步揭示深部礦井流熱耦合作用機(jī)理，合理有效的利用礦井降溫技術(shù)及開發(fā)地?zé)豳Y源有重要的理論價(jià)值及現(xiàn)實(shí)意義。 本文在國內(nèi)外巖體滲流及礦井熱環(huán)境研究的基礎(chǔ)上，，應(yīng)用傳熱學(xué)、流體力學(xué)、水文地質(zhì)學(xué)等理論，對(duì)地下水滲流作用下深部巷道圍巖溫度場(chǎng)及巷道內(nèi)風(fēng)流熱環(huán)境進(jìn)行了數(shù)值研究。理論分析了巖體滲流模型及規(guī)律，推導(dǎo)了地下水流場(chǎng)、溫度場(chǎng)及其滲流作用下深井巷道圍巖溫度場(chǎng)、巷道風(fēng)流流場(chǎng)及溫濕場(chǎng)數(shù)學(xué)模型，確定其影響因素；采用FLUENT軟件研究了不同滲流速度和滲流溫度作用下巷道圍巖溫度場(chǎng)分布；進(jìn)而對(duì)工程現(xiàn)場(chǎng)條件下的周源山煤礦-800m北大巷風(fēng)流溫度場(chǎng)進(jìn)行了數(shù)值模擬，研究了不同送風(fēng)參數(shù)（送風(fēng)量、送風(fēng)溫度、送風(fēng)相對(duì)濕度）對(duì)掘進(jìn)巷道熱環(huán)境的影響。 研究表明：地下水滲流改變了巷道圍巖溫度場(chǎng)的分布形式，使其由對(duì)稱分布變?yōu)榉菍?duì)稱分布。地下水滲流速度、溫度均對(duì)圍巖溫度場(chǎng)分布有著重要影響，當(dāng)流速小于2×10-8m/s時(shí)，對(duì)巷道圍巖溫度場(chǎng)的影響是微小的。伴隨著送風(fēng)量增大，巷道內(nèi)空氣溫度降低，相對(duì)濕度及其在回風(fēng)方向上的增減梯度減��；當(dāng)送風(fēng)量達(dá)到7m3/s后繼續(xù)增大，巷道內(nèi)風(fēng)流均溫變化很小，增大送風(fēng)量的降溫效果有限。送風(fēng)溫度降低，巷道內(nèi)空氣溫度隨之降低，風(fēng)流溫度在回風(fēng)路徑上的遞增幅度逐漸增大，空氣相對(duì)濕度呈現(xiàn)先增后降趨勢(shì)。送風(fēng)相對(duì)濕度降低，巷道內(nèi)風(fēng)流溫度基本保持不變，而空氣相對(duì)濕度明顯降低。確定了適宜的送風(fēng)參數(shù)為：送風(fēng)量為7m3/s，送風(fēng)溫度為24℃，送風(fēng)濕度為50%。
[Abstract]:With the continuous extension of mine mining, the heat release of surrounding rock becomes the dominant factor of thermal damage. The deep rock mass is rich in a large number of voids, when there is groundwater seepage, it will change the distribution of rock mass temperature field, and then affect the temperature field of air flow in the roadway and the underground working environment. Therefore, the study on the temperature field of surrounding rock and air flow in roadway under the action of groundwater seepage will further reveal the mechanism of fluid-heat coupling in deep mine. Reasonable and effective use of mine cooling technology and exploitation of geothermal resources have important theoretical and practical significance. Based on the study of rock mass seepage and mine thermal environment at home and abroad, the theories of heat transfer, hydrodynamics, hydrogeology and so on are applied in this paper. The temperature field of surrounding rock of deep roadway and the thermal environment of wind flow in roadway under the action of groundwater seepage are studied numerically. The seepage model and law of rock mass are analyzed theoretically, and the mathematical models of surrounding rock temperature field, wind flow field and temperature moisture field of deep well roadway under the action of underground flow field, temperature field and seepage flow are deduced, and the influencing factors are determined. The temperature field distribution of roadway surrounding rock under different seepage velocity and percolation temperature is studied by using FLUENT software, and the temperature field of wind flow in Zhouyuanshan Coal Mine -800m North roadway under the condition of engineering site is numerically simulated. The influence of different air supply parameters (air supply rate, air supply temperature, air supply relative humidity) on the thermal environment of tunneling roadway is studied. The results show that the distribution of temperature field in surrounding rock of roadway is changed from symmetrical distribution to asymmetric distribution by groundwater seepage. The velocity and temperature of groundwater seepage have an important influence on the temperature field distribution of surrounding rock. When the velocity of flow is less than 2 脳 10-8m/s, the influence on the temperature field of roadway surrounding rock is small. With the increase of air supply rate, the air temperature in the tunnel decreases, the relative humidity and its gradient decrease in the direction of return air, and when the air supply volume reaches 7m3/s, the average temperature of the air flow in the tunnel changes little, and the cooling effect of increasing the air supply rate is limited. With the decrease of air supply temperature, the air temperature in roadway decreases, the increasing amplitude of air flow temperature in the return air path increases gradually, and the relative humidity of air increases first and then decreases. The relative humidity of air supply decreases, the air flow temperature in the tunnel remains unchanged, and the relative humidity of air decreases obviously. The suitable air supply parameters are determined as follows: air supply volume is 7 m3 / s, air supply temperature is 24 鈩

本文編號(hào)：2150109