本文選題：瓦斯爆炸　切入點：管道系統(tǒng)　出處：《遼寧工程技術(shù)大學(xué)》2017年碩士論文

【摘要】：瓦斯爆炸是煤礦安全生產(chǎn)中破壞較大的事故之一,對瓦斯爆炸規(guī)律的研究一直是煤礦安全事故研究的重點。由于瓦斯爆炸破壞性大,對爆炸特性的研究多在實驗平臺上進(jìn)行。多年來,國內(nèi)外眾多學(xué)者針對自己的實驗方案搭建了不同形狀和尺寸的實驗平臺,得出了很多實驗平臺上爆炸規(guī)律的結(jié)論。論文在遼寧工程技術(shù)大學(xué)容器—管道實驗平臺瓦斯爆炸規(guī)律研究的基礎(chǔ)上,查閱收集了該領(lǐng)域內(nèi)其它研究人員的實驗數(shù)據(jù),綜合對比分析了不同尺寸的管道系統(tǒng)和容器—管道系統(tǒng)的爆炸特性。數(shù)值計算了不同尺度的管道系統(tǒng)瓦斯爆炸特性,研究了巷道支護(hù)對瓦斯爆炸特性傳播的影響。研究結(jié)果表明:在管道系統(tǒng)中,爆炸壓力在不同長度和管徑的實驗管道系統(tǒng)中的傳播有著相同的走勢,瓦斯爆炸傳播過程中火焰?zhèn)鞑ニ俣却嬖诿黠@的尺寸效應(yīng)。當(dāng)管徑大于臨界阻火直徑時,尺寸較小時,火焰?zhèn)鞑ニ俣缺憩F(xiàn)較大,而隨著尺寸增大,火焰?zhèn)鞑ニ俣瘸霈F(xiàn)減小的趨勢。在兩種不同尺寸的容器—管道系統(tǒng)中,爆炸壓力隨時間的傳播趨勢是一樣的,傳播趨勢為爆炸壓力在短時間內(nèi)迅速上升到最大值,之后下降。不同濃度的瓦斯爆炸的沖擊波特性在容器—管道系統(tǒng)中存在著明顯差異,瓦斯?jié)舛鹊脑龃笠彩贡▔毫ι仙俾试龃?通過數(shù)值模擬發(fā)現(xiàn)管道截面尺寸增大,管道中火焰面發(fā)展充滿管道時間增加;管道末端火焰面“內(nèi)凹”效果越明顯;火焰面發(fā)展至相同位置時,大尺寸管道中平均溫度較高。存在支護(hù)條件管道瓦斯爆炸較無支護(hù)管道相比,瓦斯爆炸壓力升高;瓦斯壓力存在明顯振蕩,支護(hù)尺寸增大,瓦斯爆炸壓力最大上升速率升高;隨著支護(hù)尺寸增大,火焰面發(fā)展至相同位置時,巷道平均溫度下降。
[Abstract]:Gas explosion is one of the most destructive accidents in coal mine safety production. The study of gas explosion law has always been the focus of coal mine safety accident research.Because of the destructive nature of gas explosion, the research of explosion characteristics is mostly carried out on the experimental platform.For many years, many scholars at home and abroad have built different shape and size experimental platforms for their own experimental schemes, and have drawn the conclusion of explosion law on many experimental platforms.On the basis of the research on the gas explosion law of the container-pipeline experimental platform of Liaoning University of Engineering and Technology, the experimental data of other researchers in this field have been consulted and collected in this paper.The explosion characteristics of different size pipeline system and vessel-pipeline system are analyzed and compared.The characteristics of gas explosion in pipeline system with different scales are numerically calculated, and the influence of roadway support on the propagation of gas explosion characteristics is studied.The results show that the propagation of explosion pressure in the experimental pipeline system of different lengths and diameters has the same trend, and the flame propagation velocity has obvious size effect in the process of gas explosion propagation.When the diameter of the pipe is larger than the critical flame resistance diameter, the flame propagation velocity is larger when the size is small, but with the increase of the size, the flame propagation velocity decreases.The propagation trend of explosion pressure with time is the same in two kinds of container-pipeline systems with different sizes. The propagation trend is that the explosive pressure rises rapidly to the maximum in a short time and then decreases.The shock wave characteristics of different concentrations of gas explosion are obviously different in the container-pipeline system, and the increase of gas concentration also increases the rate of explosion pressure rise, through numerical simulation, it is found that the section size of pipeline increases.When the flame surface develops to the same position, the average temperature in the large scale pipeline is higher.The gas explosion pressure of pipeline is higher than that of unsupported pipeline, the gas pressure oscillates obviously, the support dimension increases, the maximum rate of gas explosion pressure rises; with the increase of support size, the gas explosion pressure increases with the increase of support size.When the flame surface reaches the same position, the average temperature of roadway decreases.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD712.7

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