發(fā)布時(shí)間：2018-11-08 15:57

【摘要】：隨著礦井開采深度的增加以及綜合機(jī)械化水平的提高,高溫?zé)岷ΜF(xiàn)象越來越嚴(yán)重。當(dāng)前礦井降溫理論已形成比較完整的理論體系,礦井局部降溫技術(shù)及礦井末端空冷器的研制技術(shù)也較為成熟,但是在采煤工作面上進(jìn)行降溫的研究還很少。因此,對(duì)采煤工作面高效空冷器進(jìn)行研究將是礦井局部降溫中急需解決的一個(gè)問題。本文對(duì)采煤工作面周圍的散熱介質(zhì)與風(fēng)流間熱交換情況進(jìn)行理論分析,提出了采煤工作面溫度分布函數(shù)關(guān)系;根據(jù)采煤工作面工人的實(shí)際工作情況,提出了有效需冷區(qū)域;將射流理論運(yùn)用到空冷器風(fēng)口射出冷風(fēng)流方面,理論上確定了空冷器的相關(guān)性能參數(shù)與采煤工作面風(fēng)流溫度間的關(guān)系,并結(jié)合采煤工作面溫度分布函數(shù)關(guān)系式,對(duì)采煤工作面上空冷器布置的理論間距和數(shù)量進(jìn)行了確定;運(yùn)用矩陣?yán)碚搶?duì)空冷器性能參數(shù)的合理設(shè)計(jì)進(jìn)行了方案優(yōu)化。根據(jù)某一采煤工作面實(shí)際情況對(duì)空冷器性能參數(shù)進(jìn)行了優(yōu)選,最終確定的最優(yōu)方案為空冷器的半徑為0.09m,送風(fēng)速度為2.4m/s,送風(fēng)溫度為22℃C;具體布置為:在距采煤工作面進(jìn)風(fēng)端0-63m,每3個(gè)液壓支架布置一個(gè)空冷器,布置14個(gè);在60-99m,每2個(gè)液壓支架布置一個(gè)空冷器,布置13個(gè);在99-150m,每1個(gè)液壓支架布置一個(gè)空冷器,布置31個(gè),共布置58個(gè)空冷器。為進(jìn)一步驗(yàn)證本理論的可行性,運(yùn)用ANSYS中Fluent模塊結(jié)合采煤工作面實(shí)際情況及理論優(yōu)選方案確定的參數(shù)進(jìn)行了風(fēng)流溫度場模擬,模擬結(jié)果顯示,在滿足采煤工作面溫度不得高于26℃C的前提下,第14個(gè)空冷器有效降溫距離為4.5m,第27個(gè)空冷器有效降溫距離為3.5m,第58個(gè)空冷器有效降溫距離為3.5m,滿足了理論上布置第1-14個(gè)空冷器有效降溫距離為4.5m,理論上布置第15-27個(gè)空冷器有效降溫距離為3m,理論上布置第28-58個(gè)空冷器有效降溫距離為1.5m的要求,模擬結(jié)果與理論研究相吻合。本研究為礦井降溫技術(shù)提供了一定的理論價(jià)值。
[Abstract]:With the increase of mining depth and the improvement of comprehensive mechanization, the phenomenon of high temperature thermal damage is becoming more and more serious. At present, the theory of mine cooling has formed a relatively complete theoretical system, and the technology of local cooling and the development of the air cooler at the end of the mine are also relatively mature, but the research of cooling temperature on the coal face is still rare. Therefore, the study of high efficiency air cooler in coal mining face will be an urgent problem to be solved in local cooling of coal mine. Based on the theoretical analysis of the heat exchange between the radiating medium and the air flow around the coal face, the relationship between the temperature distribution function of the coal mining face and the actual working conditions of the workers in the coal mining face, the effective cooling area is put forward in this paper. In this paper, the jet theory is applied to the cold air flow from the air cooler nozzle, and the relationship between the relevant performance parameters of the air cooler and the air flow temperature in the coal mining face is theoretically determined, and the relationship between the temperature distribution function of the coal face and the temperature distribution function of the coal mining face is also given. The theoretical spacing and quantity of air cooler arrangement on coal mining face are determined. The optimal design of air cooler performance parameters is carried out by using matrix theory. According to the actual situation of a coal mining face, the performance parameters of the air cooler are optimized. The optimum scheme is that the radius of the air cooler is 0.09 m, the air velocity is 2.4 m / s, and the air supply temperature is 22 鈩，

本文編號(hào)：2318957