發(fā)布時(shí)間：2018-07-15 15:57

【摘要】：礦井巷道火災(zāi)發(fā)生后，對(duì)于井下巷道，由于空間相對(duì)密閉，狹小，，大量有毒有害煙氣產(chǎn)生，并隨風(fēng)流在巷道內(nèi)流動(dòng)，使得井下巷道內(nèi)氧氣供應(yīng)不足，井下巷道內(nèi)風(fēng)流流動(dòng)發(fā)生紊亂，往往會(huì)造成不必要的人身財(cái)產(chǎn)損失。因此，針對(duì)巷道火災(zāi)時(shí)期火災(zāi)煙流流經(jīng)巷道的節(jié)流效應(yīng)以及火區(qū)影響下的礦井通風(fēng)網(wǎng)絡(luò)風(fēng)量的科學(xué)解算方法的研究，對(duì)于研究礦井火災(zāi)時(shí)期巷道通風(fēng)系統(tǒng)風(fēng)流可靠性，合理分配風(fēng)量，以及火區(qū)治理時(shí)實(shí)現(xiàn)均壓通風(fēng)以及救援方案的制定具有科學(xué)的指導(dǎo)意義。 為了實(shí)現(xiàn)計(jì)算機(jī)對(duì)火災(zāi)時(shí)期礦井巷道通風(fēng)網(wǎng)絡(luò)的精確解算，首先，通過(guò)運(yùn)用流體力學(xué)原理中的相似理論建立了與呼和烏素煤礦4101工作面主運(yùn)、輔運(yùn)、以及聯(lián)絡(luò)巷相一致的1:20比例相似火災(zāi)實(shí)驗(yàn)?zāi)Ｐ�，通過(guò)該實(shí)驗(yàn)?zāi)Ｐ瓦M(jìn)行巷道火災(zāi)模擬實(shí)驗(yàn)，研究了火區(qū)阻力以及節(jié)流效應(yīng)產(chǎn)生的機(jī)理，通過(guò)對(duì)實(shí)驗(yàn)數(shù)據(jù)進(jìn)行分析得出了節(jié)流效應(yīng)與火災(zāi)規(guī)模，風(fēng)速大小之間的關(guān)系，并通過(guò)理論分析與實(shí)驗(yàn)?zāi)M相結(jié)合的方法，推導(dǎo)出了節(jié)流效應(yīng)與火區(qū)阻力之間的關(guān)系以及節(jié)流系數(shù)的擬合方程式。 其次，通過(guò)對(duì)火災(zāi)時(shí)期巷道內(nèi)火風(fēng)壓的產(chǎn)生機(jī)理以及火風(fēng)壓計(jì)算方法進(jìn)行理論分析，對(duì)火風(fēng)壓以及火災(zāi)節(jié)流效應(yīng)共同影響下的礦井傾斜巷道風(fēng)流穩(wěn)定性進(jìn)行研究，得出了火災(zāi)發(fā)生后與火災(zāi)巷道相關(guān)聯(lián)巷道內(nèi)風(fēng)流的變化規(guī)律，推導(dǎo)出了關(guān)聯(lián)巷道內(nèi)風(fēng)流流向不變、風(fēng)速為零、風(fēng)流反向時(shí)的判別關(guān)系式。通過(guò)進(jìn)行火災(zāi)模擬實(shí)驗(yàn)，對(duì)火災(zāi)時(shí)期角聯(lián)巷道內(nèi)風(fēng)流的溫度、風(fēng)速、風(fēng)壓的變化情況進(jìn)行記錄與分析，得出了火災(zāi)發(fā)生后角聯(lián)巷道內(nèi)風(fēng)流流動(dòng)的變化規(guī)律。通過(guò)在火災(zāi)末期改變通風(fēng)機(jī)工況的方法，研究了通風(fēng)機(jī)工況的改變對(duì)火災(zāi)巷道內(nèi)風(fēng)流流動(dòng)規(guī)律的影響。 最后，經(jīng)過(guò)分析推導(dǎo)得出了通風(fēng)機(jī)風(fēng)壓以及火災(zāi)時(shí)期通風(fēng)網(wǎng)絡(luò)各分支巷道的風(fēng)阻值的計(jì)算式，并通過(guò)對(duì)正常時(shí)期通風(fēng)網(wǎng)絡(luò)解算方法進(jìn)行改進(jìn)得到了適合于火災(zāi)巷道風(fēng)網(wǎng)解算的改進(jìn)的斯考德 恒斯雷迭代法，并運(yùn)用MATLAB計(jì)算機(jī)語(yǔ)言依據(jù)火災(zāi)時(shí)期通風(fēng)網(wǎng)絡(luò)模型運(yùn)用改進(jìn)的斯考德 恒斯雷迭代法進(jìn)行計(jì)算機(jī)程序編制，最終實(shí)現(xiàn)了計(jì)算機(jī)解算。
[Abstract]:After the mine roadway fire happened, the underground roadway, because the space is relatively closed, narrow, a large number of toxic and harmful smoke produced, and flow with the wind flow in the roadway, make the underground roadway oxygen supply is insufficient, The disturbance of air flow in underground roadway often results in unnecessary loss of life and property. Therefore, in view of the throttling effect of fire smoke flow through the roadway during the tunnel fire period and the scientific calculation method of mine ventilation network air volume under the influence of fire area, the reliability of ventilation system in roadway during mine fire period is studied. The rational distribution of air volume, the realization of equalizing pressure ventilation and the formulation of rescue plan in fire area management have scientific guiding significance. In order to solve the ventilation network of mine roadway accurately by computer during fire period, firstly, by using the similarity theory of hydrodynamics principle, the main transportation and auxiliary transportation of 4101 face of Huhe Wusu Coal Mine are established. And the 1:20 proportional similar fire experimental model is used to simulate the tunnel fire, and the mechanism of resistance and throttling effect in the fire zone is studied. By analyzing the experimental data, the relationship between throttling effect and fire scale and wind speed is obtained, and the method of combining theoretical analysis with experimental simulation is presented. The relationship between throttling effect and fire resistance and the fitting equation of throttling coefficient are deduced. Secondly, through the theoretical analysis of the generation mechanism of the fire wind pressure and the calculation method of the fire wind pressure in the roadway during the fire period, the stability of the mine inclined roadway wind flow under the influence of the fire wind pressure and the fire throttling effect is studied. The variation law of the air flow in the roadway associated with the fire is obtained, and the discriminant relationship is derived when the wind flow direction is invariable, the wind speed is zero, and the wind flow is reversed in the associated roadway. Through the fire simulation experiment, the variation of air flow temperature, wind speed and wind pressure in the corner tunnel during the fire period is recorded and analyzed, and the variation law of the air flow in the corner tunnel after the fire occurs is obtained. By means of changing the working condition of ventilator at the end of fire, the influence of the change of fan working condition on the flow law of air flow in fire tunnel is studied. Finally, the formula of wind pressure of ventilator and the wind resistance of each branch roadway of ventilation network during fire is obtained by analyzing and deducing. By improving the method of ventilation network calculation in normal period, an improved Scauld's constant Srey iteration method is obtained, which is suitable for solving the wind network of fire roadway. According to the ventilation network model of fire period, MATLAB computer language is used to program the computer program by using the improved Scauld Heng Srey iteration method, and finally the computer solution is realized.
【學(xué)位授予單位】：內(nèi)蒙古科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TD724

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本文編號(hào)：2124607