金星金矿热源对通风系统影响的研究

发布时间：2018-03-03 04:36

本文选题：通风系统　切入点：热源　出处：《山东科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着开采深度的不断增加,越来越多的矿井面临着热害问题,在进行通风系统优化的同时达到工作面的降温要求具有十分重要的意义。论文以金星金矿为研究背景,针对该矿存在的通风阻力大、深部地区热害严重等问题,通过对比考虑热阻前后的通风网络模拟结果,研究散热对通风系统的影响,在此基础上提出并确定通风系统优化方案。对金星金矿通风系统进行通风阻力测定,并对常用的热环境评价方法的优缺点进行分析和比较,最终选择PMV-PPD评价方法对工作地点进行热环境评价,通过通风系统阻力测定和热环境评价结果得到通风系统现状,发现金星金矿十七中段以下区域高温热害严重。然后对金星金矿内的热源及其散热量进行分类测算,结果表明矿井内的主要热源为围岩散热、机电设备散热、空气自压缩散热以及局部热水,同时按照风流的路线对整个矿井通风的风流热力状态变化进行分析,结果表明矿井热害出现的主要原因是十七中段热水涌出以及深部地区地温高。紧接着利用Ventsim软件建立金星金矿通风系统三维模型,并对其进行了参数设置,在此基础上进行通风网络风流解算和热模拟解算;引入热阻的概念,对金星金矿内的高温巷道进行热阻的计算,再将热阻嵌入通风系统并对嵌入后的通风系统进行网络解算;对比嵌入热阻前后的解算结果,可以看出由于热源散热产生的热阻力对金星金矿通风系统的总风量影响较小,但是对于局部高温巷道的风量影响比较明显,同时,热源的存在对局部通风系统风流温度的影响也比较明显;在对十七中段局部热水采取措施治理后,仍有部分区域存在高温问题。对矿井降温所需风量进行计算,结果表明仅通过加大风量不能够彻底解决工作面高温问题。最后针对金星金矿通风系统存在的问题,按照优化原则提出了四种优化改造方案;对各方案进行通风网络风流模拟和热模拟,通过模拟结果的比较,得到各方案的优缺点,并确定方案四为最佳优化方案。
[Abstract]:With the increasing of mining depth, more and more mines are faced with the problem of thermal damage. It is very important to optimize ventilation system and to meet the requirement of cooling the working face at the same time. Aiming at the problems of large ventilation resistance and serious thermal damage in deep area, the influence of heat dissipation on ventilation system is studied by comparing the simulation results of ventilation network before and after considering thermal resistance. On this basis, the optimization scheme of ventilation system is put forward and determined. The ventilation resistance of the ventilation system of Jinxing Gold Mine is measured, and the advantages and disadvantages of common thermal environment evaluation methods are analyzed and compared. Finally, the PMV-PPD evaluation method is selected to evaluate the thermal environment of the workplace, and the present situation of the ventilation system is obtained by measuring the resistance of the ventilation system and evaluating the thermal environment. It is found that the area below the middle section of Jinxing Gold Mine 17 is seriously damaged by high temperature. Then the heat source and its heat dissipation in Jinxing Gold Mine are classified and calculated. The results show that the main heat source in the mine is the heat dissipation of surrounding rock and the heat dissipation of electromechanical equipment. Air self-compressing heat dissipation and local hot water, at the same time, according to the route of air flow, the air flow thermodynamic state of the whole mine ventilation is analyzed. The results show that the main causes of mine thermal damage are the hot water emission in the middle section of 17 and the high ground temperature in the deep area. Then the three-dimensional model of ventilation system of gold mine of Venus is established by using Ventsim software, and the parameters are set up. On this basis, the ventilation network air flow solution and thermal simulation solution are carried out, the thermal resistance is calculated by introducing the concept of thermal resistance, and then the thermal resistance is embedded into the ventilation system and the network solution of the embedded ventilation system is carried out. Comparing the calculation results before and after embedding thermal resistance, it can be seen that the thermal resistance caused by heat source heat dissipation has little effect on the total air volume of gold mine ventilation system of Venus gold mine, but has a more obvious effect on the local high temperature roadway air volume, at the same time, The influence of heat source on the air flow temperature of local ventilation system is also obvious. After taking measures to treat the local hot water in the middle section of 17, there are still high temperature problems in some areas. The results show that the problem of high temperature in the face can not be solved completely by increasing the air volume. Finally, in view of the problems existing in the ventilation system of Jinxing Gold Mine, four optimization schemes are put forward according to the principle of optimization. The ventilation network air flow simulation and thermal simulation of each scheme are carried out. Through the comparison of simulation results, the advantages and disadvantages of each scheme are obtained, and the fourth scheme is determined as the best optimization scheme.
【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD724

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