基于矿井水源的井下降温技术应用
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摘要
为解决深井开采下作业环境的高温热害问题,在分析井下高温热害致灾因素的基础上,探讨了井下主要热源的类别及其散热量的计算,并制定有效的热害治理方案。在综合分析传统制冷降温原理的基础上,提出一种以矿井水源为冷源的降温技术方案,通过提取矿井涌水中蕴含的天然冷能来实现对深井高温作业面上的热害治理。结合了金渠金矿1 118 m坑口矿井作业面上的高温热害问题和井下的开采现状,利用640 m水平存在的低温涌水,在440 m水平的回风井附近建立制冷降温系统,对280 m水平中段西翼独头掘进作业面进行降温降湿的热害治理。实践结果表明,降温后,280 m水平西翼独头掘进工作环境的温度控制在28℃以内,相比降温前降低了4~5℃,作业面上的相对湿度也控制在75%左右。
In order to solve the problem of high temperature calamity in the working environment of deepmining,based on the analysis of the disaster factors caused by high temperature calamity underground,the categories of the main heat sources and the calculation of heat dissipation are discussed,and an effective scheme of heat hazard control is formulated. On the basis of a comprehensive analysis of the traditional refrigeration principle,a cooling technology scheme using mine water source as a cold source is proposed. By extracting the natural cold energy contained in the mine water the heat damage treatment on high temperature working surface of deep shaft is realized. The cooling program was taken in the mine face of 1 118 m pithead of Jinqu gold mine with the high temperature thermal damage problem and combines with the underground mining status. The low temperature gushing water at level of640 m was used,a cooling cooling system was set up near the return air shaft of 440 m level. The 280 m level of the West Wing heading end working surface was taken cooling dehumidification heat treatment.The results of practice show that the working temperature of the west wing single-head tunneling working under 280 m cooling level is controlled within 28 ℃ after cooling down,4—5 ℃ lower than before the cooling,and the relative humidity on the working surface is controlled at about 75%.
In order to solve the problem of high temperature calamity in the working environment of deepmining,based on the analysis of the disaster factors caused by high temperature calamity underground,the categories of the main heat sources and the calculation of heat dissipation are discussed,and an effective scheme of heat hazard control is formulated. On the basis of a comprehensive analysis of the traditional refrigeration principle,a cooling technology scheme using mine water source as a cold source is proposed. By extracting the natural cold energy contained in the mine water the heat damage treatment on high temperature working surface of deep shaft is realized. The cooling program was taken in the mine face of 1 118 m pithead of Jinqu gold mine with the high temperature thermal damage problem and combines with the underground mining status. The low temperature gushing water at level of640 m was used,a cooling cooling system was set up near the return air shaft of 440 m level. The 280 m level of the West Wing heading end working surface was taken cooling dehumidification heat treatment.The results of practice show that the working temperature of the west wing single-head tunneling working under 280 m cooling level is controlled within 28 ℃ after cooling down,4—5 ℃ lower than before the cooling,and the relative humidity on the working surface is controlled at about 75%.
引文
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[3]王海宁,彭家兰,程哲.高温矿井的通风与降温分析[J].有色金属工程,2013,3(3):34-37.
[4]姬建虎.掘进工作面传热特性及热害治理研究[D].重庆:重庆大学,2014.
[5]张永春.朱集矿热害治理技术与降温效果研究[J].煤矿安全,2015(10):157-159.
[6]GUO P Y,HE M C,ZHENG L G,et al.A geothermal recycling system for cooling and heating in deep mines[J].Applied thermal engineering,2017,116:833-839.
[7]SHI B B,MA L J,DONG W,et al.Application of a novel liquid nitrogen control technique for heat stress and fire prevention in underground mines[J].Journal of occupational and environmental hygiene,2015,12(8):168-177.
[8]何满潮,郭平业.深部岩体热力学效应及温控对策[J].岩石力学与工程学报,2013(12):2377-2393.
[9]康长豪,查文华,张亮,等.深部开采高温控制理论与技术分析[J].煤矿安全,2016,47(5):89-93.
[10]黄山果,吴超,邱冠豪,等.深井采矿热贡献率计算方法研究与实践[J].中国安全生产科学技术,2015,11(1):91-96.
[11]龙二鹏,王新丰,邱辰.深部开采高温热害控制方法[J].煤矿安全,2013(10):140-142.
[12]聂兴信,魏小宾.金渠金矿通风系统改造方案的优选与实践[J].矿业研究与开发,2017(8):85-89.