高河能源矿井通风系统优化研究
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摘要
矿井通风系统是矿井生产系统的重要组成部分,它对矿井的稳产高产、防灾抗灾能力和矿井的经济效益有着重大的影响。但是随着自然条件、生产能力和生产布局的变化,矿井通风系统逐渐复杂,人工解算难度越来越大,为使矿井通风系统稳定可靠,就必须借助现代技术手段对通风系统进行优化,以保证安全生产。
高河能源矿井为高瓦斯矿井,通风系统复杂。本文采用现场实测、理论分析和计算机模拟相结合的方法,从高河能源矿井通风系统现状出发,主要研究了以下两个方面的内容：
(1)运用网络解算等手段,对矿井通风系统并联进风大巷之间的往返风问题进行了优化,降低了系统阻力,提高了矿井的供风能力。通过对高河能源矿井通风系统进行分析可知,矿井西翼盘区进风大巷间存在往返风的现象,针对这一现象提出了减少往返风的优化方案,运用通风网络解算对优化方案进行模拟,由模拟结果可知,优化后中央风井主扇风压降低了14.87Pa,风量增加了0.53m3/s,小庄风井主扇风压降低了83.37Pa,风量增加了2.97m3/s,从而降低了西翼盘区进风系统的阻力,使矿井的供风能力增强。
(2)对矿井某盘区隔离后通风系统进行优化。矿井通风系统是一个动态系统,当矿井某盘区发生威胁邻近盘区乃至全矿的重大灾害时,需要关闭事故盘区的隔离门,保护矿井其它盘区与主要进回风大巷、井筒的安全。但隔离门关闭后会改变矿井通风系统、改变主扇风机的工况点,可能给矿井带来次生灾害。为提高矿井的抗灾和救灾能力,本文分别提出了高河能源矿井北翼、西翼、东翼盘区隔离后通风系统的优化方案,并运用通风网络解算对优化方案进行了模拟分析,针对各方案的主要通风机工况点、巷道风流稳定性的安全隐患,采取措施进行优化调整,确定了各个盘区隔离后的通风系统的优化方案。
Mine ventilation system is an important part of the mine production system, which has a major impact on high and stable yield, disaster prevention and resilience and economic benefits. However, with the changes of natural conditions, production capacity and production layout, mine ventilation systems became more complex, and artificial calculation became more difficult. Therefore, modern techniques must be used to optimize the mine ventilation system to ensure the reliability of the system and safe production.
Gaohe energy coal mine is a high-methane coal mine, the ventilation system is complex. Based on the status of the ventilation system of the Gaohe energy coal mine and by the method of a combination of field measurement, theoretical analysis and computer simulation, the thesis mainly focused on the following two aspects:
(1) The roundtrip wind in the parallel intake roadway of the mine ventilation system has been optimized using network calculation, which has reduced the resistance of the system and improved the capacity of the mine for wind.The analysis result showed that the roundtrip wind exist in main intake air roadways in the mine west wing mining panel.The thesis proposed the optimization scheme to solve this problem,then simulated the scheme by use of the network calculation.The simulation results showed that pressure of the main fan in the central well dropped14.87Pa, whereas the air volume increased0.53m3/s, and pressure of the main fan in the Xiaozhuang well droped83.37Pa while the air volume increased2.97m3/s after the optimization, which reduced the resistance of the air intake system of the west wing mining panel and enhanced the capacity of the wind supply.
(2)To optimize the ventilation system in the mine when the mining panel was isolated. Mine ventilation system is a dynamic system. When major disaster occurs, it's necessary to close the accidents in mining area to prevent the expansion of the disaster and to protect the safety of the other mining panel, the main return air roadway and the shaft. But close the isolation gates maybe change the mine ventilation system and the operating point of the main fan, it may bring secondary disaster to mine. In order to improve the capacity to prevent disaster and disaster relief. The thesis proposed to set the optimization scheme in the mining panel of east wing, west wing and north wing in Gaohe energy mine, then simulated the isolated ventilation system by network calculation. In addition, the thesis put forward the optimization measures to ensure the appropriate scheme of optimization of the ventilation system in terms of the hidden danger of fan operating point and airflow stability in the schemes.
高河能源矿井为高瓦斯矿井,通风系统复杂。本文采用现场实测、理论分析和计算机模拟相结合的方法,从高河能源矿井通风系统现状出发,主要研究了以下两个方面的内容：
(1)运用网络解算等手段,对矿井通风系统并联进风大巷之间的往返风问题进行了优化,降低了系统阻力,提高了矿井的供风能力。通过对高河能源矿井通风系统进行分析可知,矿井西翼盘区进风大巷间存在往返风的现象,针对这一现象提出了减少往返风的优化方案,运用通风网络解算对优化方案进行模拟,由模拟结果可知,优化后中央风井主扇风压降低了14.87Pa,风量增加了0.53m3/s,小庄风井主扇风压降低了83.37Pa,风量增加了2.97m3/s,从而降低了西翼盘区进风系统的阻力,使矿井的供风能力增强。
(2)对矿井某盘区隔离后通风系统进行优化。矿井通风系统是一个动态系统,当矿井某盘区发生威胁邻近盘区乃至全矿的重大灾害时,需要关闭事故盘区的隔离门,保护矿井其它盘区与主要进回风大巷、井筒的安全。但隔离门关闭后会改变矿井通风系统、改变主扇风机的工况点,可能给矿井带来次生灾害。为提高矿井的抗灾和救灾能力,本文分别提出了高河能源矿井北翼、西翼、东翼盘区隔离后通风系统的优化方案,并运用通风网络解算对优化方案进行了模拟分析,针对各方案的主要通风机工况点、巷道风流稳定性的安全隐患,采取措施进行优化调整,确定了各个盘区隔离后的通风系统的优化方案。
Mine ventilation system is an important part of the mine production system, which has a major impact on high and stable yield, disaster prevention and resilience and economic benefits. However, with the changes of natural conditions, production capacity and production layout, mine ventilation systems became more complex, and artificial calculation became more difficult. Therefore, modern techniques must be used to optimize the mine ventilation system to ensure the reliability of the system and safe production.
Gaohe energy coal mine is a high-methane coal mine, the ventilation system is complex. Based on the status of the ventilation system of the Gaohe energy coal mine and by the method of a combination of field measurement, theoretical analysis and computer simulation, the thesis mainly focused on the following two aspects:
(1) The roundtrip wind in the parallel intake roadway of the mine ventilation system has been optimized using network calculation, which has reduced the resistance of the system and improved the capacity of the mine for wind.The analysis result showed that the roundtrip wind exist in main intake air roadways in the mine west wing mining panel.The thesis proposed the optimization scheme to solve this problem,then simulated the scheme by use of the network calculation.The simulation results showed that pressure of the main fan in the central well dropped14.87Pa, whereas the air volume increased0.53m3/s, and pressure of the main fan in the Xiaozhuang well droped83.37Pa while the air volume increased2.97m3/s after the optimization, which reduced the resistance of the air intake system of the west wing mining panel and enhanced the capacity of the wind supply.
(2)To optimize the ventilation system in the mine when the mining panel was isolated. Mine ventilation system is a dynamic system. When major disaster occurs, it's necessary to close the accidents in mining area to prevent the expansion of the disaster and to protect the safety of the other mining panel, the main return air roadway and the shaft. But close the isolation gates maybe change the mine ventilation system and the operating point of the main fan, it may bring secondary disaster to mine. In order to improve the capacity to prevent disaster and disaster relief. The thesis proposed to set the optimization scheme in the mining panel of east wing, west wing and north wing in Gaohe energy mine, then simulated the isolated ventilation system by network calculation. In addition, the thesis put forward the optimization measures to ensure the appropriate scheme of optimization of the ventilation system in terms of the hidden danger of fan operating point and airflow stability in the schemes.
引文
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