胶东半岛金属矿山浅层巷道地温效应调控风流温度的节能机理研究

Many metal mines in Jiaodong peninsula are hot and humid in summer while their wellheads are frozen in winter that become a potential safety hazard of mines. It is the mine shallow terrestrial heat resource that belongs to a kind of green energy, so it is more successful with energy-efficient and greener values by reasonably usage to promote underground working environment.In order to fully utilize the mine shallow geothermal resources and solve the practical production problems in the mine,Article is based on the Daliuhang gold Mine of Shandong Gold Cooperation Company as a laboratory, proposing the thought of resource utilization of the effect of shallow ground temperature about mines according to the earlier stage of research practice,and using the effect of ground temperature which is warm in the winter and cool in the summer of the upper mine layers as cool and heat source to regulate the entering wind temperature of mines,by applying the thermodynamics related theory，using the method of combining theoretical analysis 、simulation with experiment, to analyze the period changing rule of shallow abandoned tunnel ground temperature and the heat and mass transfer theories between surrounding rocks and air，carrying out research of energy exchange between rock mass and wind of metal mine shallow tunnel. Key theoretical models are constructed for quantifying control of air temperature by the shallow ground temperature effect, established tunnel area calculation expression of control unit volume under different boundary conditions，it is a theoretical basis for quantifying selection regulating temperature tunnel and accurately controlling the inlet air temperature. This Article aimed at the comprehensive appliance of metal mines in Jiaodong peninsula even the nationwide about abandoned tunnels and effect of ground temperature so that can provide theoretical support for governing the work environment of mines under the condition of green and energy-saving.

胶东半岛众多金属矿山夏季井下高温高湿，冬季井口冻井严重，成为矿山安全隐患。矿山浅层地热资源属绿色能源，合理利用以改善井下作业环境极具节能、环保价值。为了充分利用矿山浅层地热资源，解决矿山实际生产难题，课题以山东黄金集团大柳行金矿为实验基地，在前期科研实践的基础上，提出金属矿山浅层地温效应资源化利用的思路，将矿井上部岩层“冬暖夏凉”的地温效应作为矿井入风流温度调节的冷热源，应用热力学等相关理论，采用理论分析、仿真模拟和实验相结合的方法，分析浅层废弃井巷的地温周期变化规律及围岩壁面与空气的热、质传递理论，进行金属矿山浅层巷道岩层与风流能量交换研究，构建浅层地温效应量化调控风流温度的关键理论模型，建立不同边界条件下调控单位体积空气所需的巷道面积求算表达式，做为量化选择调温巷道，准确调控入风流温度的理论依据。课题的研究旨在为胶东半岛乃至全国金属矿山综合利用浅层废弃井巷和地温效应，在绿色节能条件下改善矿井工作环境提供一个可靠的理论支持。

我国有色金属产量世界第一，经过几十年高强度开采，大部分矿山已进入深部开采阶段，导致深井作业面形成高温、高湿环境，同时，冬季井口冻井严重，这些情况都严重影响井下的生产安全及生产效率。课题研究以山东黄金集团有限公司大柳行金矿为例，选取矿井上部废弃巷道为测量对象，改良深孔测温法，选取有代表性的测点位置和数量，测量岩层原始温度值，采用实地测定和理论分析的方法研究矿井上部岩层温度随不同季节的变化规律，基于现场实测数据，系统地开展浅层巷道岩层温度场和风流流场的分布规律及其耦合作用机理的理论分析研究，采用实验反演识别方法，对三维温度场模型进行反演分析，得出实验基地大柳行金矿浅层地温分布规律。在对围岩与风流热湿交换理论研究的基础上，简化围岩与风流传热、传质非稳态过程，构建不同边界条件的巷道内多维导热、对流换热模型。进行风流与围岩换热分析，建立调控单位体积空气所需的巷道面积求算表达式。利用相似理论，研发搭建典型地质条件巷道通风实验台，可模拟巷道实际的热湿环境以及不同岩壁温度时对热湿开采环境的影响，揭示风流温度场分布规律，分析对比理论模型结果与实验室模拟结果，修正热力学参数。课题研究立足生产实际，为胶东地区乃至全国金属矿山绿色资源和废旧巷道综合利用提供思路，研究成果具有广阔的应用前景和重要的科学意义。