基于热力循环理论的矿井中央泵房通风系统优化研究
Research on ventilation system optimization of mine central pump room based on thermal cycle theory
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摘要: 以竹山塘煤矿为研究背景，基于热力循环理论，对矿井中央泵房原有通风系统进行改造，将副井作为中央泵房进风井，新风井作为回风井，在副井井口设置多级喷淋室系统，构建热力循环系统，并对系统稳定性进行可行性论证，最后对井筒摩擦阻力系数、井筒平均热力学温度对热力循环系统稳定性影响展开分析。研究结果表明：热力循环系统通风总阻力为131.03 Pa，通风动压为168.63 Pa，该通风系统运行稳定可靠；热力循环系统建成后，直接释放矿井主要通风机风量负荷56.67 m3/s；通风总阻力与副井、新风井摩擦阻力系数均呈正相关关系，降低井筒摩擦阻力系数可有效减少通风总阻力；通风动压与副井平均热力学温度呈负相关关系，与新风井平均热力学温度均呈正相关关系，副井平均热力学温度越低，新风井平均热力学温度越高，越有利于热力循环系统运行稳定。热力循环对矿井中央泵房通风系统优化是有利的。Abstract: Taking Zhushantang Coal Mine as the research background, based on the thermal cycle theory, the original ventilation system of mine central pump room was reformed. The auxiliary shaft was used as the inlet air shaft of the central pump room, the fresh air shaft was used as the return air shaft, and the multi-stage spray room system was set at the wellhead of the auxiliary shaft to construct the thermal cycle system, and the feasibility of the system stability was demonstrated. Finally, the influence of wellbore friction coefficient and wellbore average thermodynamic temperature on the stability of thermal cycle system is analyzed. The results show that: the total ventilation resistance of the thermal cycle system is 131.03 Pa, the ventilation power is 168.63 Pa, the system is stable and reliable; after completion of the thermal cycle system, the air volume load of the mine fan will be released directly by 56.67 m3/s. The total ventilation resistance is positively correlated with the friction resistance coefficient of auxiliary shaft and fresh air shaft. Reducing the friction resistance coefficient of shaft can effectively reduce the total ventilation resistance. The ventilation power is negatively correlated with the average thermodynamic temperature of auxiliary shaft. The lower the average thermodynamic temperature of the auxiliary shaft is, the higher the average thermodynamic temperature of the fresh air shaft is, which is more conducive to the stable operation of the thermal cycle system.
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