矿井巷道火灾条件下通风网络解算的研究
发布时间：2018-07-15 15:57
【摘要】：矿井巷道火灾发生后，对于井下巷道，由于空间相对密闭，狭小，，大量有毒有害烟气产生，并随风流在巷道内流动，使得井下巷道内氧气供应不足，井下巷道内风流流动发生紊乱，往往会造成不必要的人身财产损失。因此，针对巷道火灾时期火灾烟流流经巷道的节流效应以及火区影响下的矿井通风网络风量的科学解算方法的研究，对于研究矿井火灾时期巷道通风系统风流可靠性，合理分配风量，以及火区治理时实现均压通风以及救援方案的制定具有科学的指导意义。 为了实现计算机对火灾时期矿井巷道通风网络的精确解算，首先，通过运用流体力学原理中的相似理论建立了与呼和乌素煤矿4101工作面主运、辅运、以及联络巷相一致的1:20比例相似火灾实验模型，通过该实验模型进行巷道火灾模拟实验，研究了火区阻力以及节流效应产生的机理，通过对实验数据进行分析得出了节流效应与火灾规模，风速大小之间的关系，并通过理论分析与实验模拟相结合的方法，推导出了节流效应与火区阻力之间的关系以及节流系数的拟合方程式。 其次，通过对火灾时期巷道内火风压的产生机理以及火风压计算方法进行理论分析，对火风压以及火灾节流效应共同影响下的矿井倾斜巷道风流稳定性进行研究，得出了火灾发生后与火灾巷道相关联巷道内风流的变化规律，推导出了关联巷道内风流流向不变、风速为零、风流反向时的判别关系式。通过进行火灾模拟实验，对火灾时期角联巷道内风流的温度、风速、风压的变化情况进行记录与分析，得出了火灾发生后角联巷道内风流流动的变化规律。通过在火灾末期改变通风机工况的方法，研究了通风机工况的改变对火灾巷道内风流流动规律的影响。 最后，经过分析推导得出了通风机风压以及火灾时期通风网络各分支巷道的风阻值的计算式，并通过对正常时期通风网络解算方法进行改进得到了适合于火灾巷道风网解算的改进的斯考德 恒斯雷迭代法，并运用MATLAB计算机语言依据火灾时期通风网络模型运用改进的斯考德 恒斯雷迭代法进行计算机程序编制，最终实现了计算机解算。
[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.
【学位授予单位】：内蒙古科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TD724
本文编号：2124607
[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.
【学位授予单位】：内蒙古科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TD724
【参考文献】
相关期刊论文 前2条
1 陈海焱,张家达;实用通风网络优化调节的节点压力分析法[J];四川冶金;1998年01期
2 程小虎;曾艳华;何川;范磊;;隧道火灾中火区阻力的理论研究[J];铁道学报;2007年05期
本文编号：2124607
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