Subjects: Mine Engineering Technology >> Mine Geology submitted time 2025-07-17
Abstract： To investigate the influencing factors of the thermal environment in subway tunnels, a field measurement campaign was conducted on Changsha Metro Line 2. The results demonstrate that the tunnel thermal environment is primarily governed by train operation frequency and heat generation, while exhibiting weak correlation with outdoor air temperature. During train operations, increased running frequency enhances heat transfer from the tunnel to surrounding rock. When trains pass through, the heat flux consistently directs from tunnel to surrounding rock. However, distinct patterns emerge during non-operational periods: in heating seasons, dominant heat transfer reverses from surrounding rock to tunnel interior, whereas transitional and cooling seasons maintain tunnel-to-rock heat dissipation. Notably, the thermal environment stabilizes significantly during train service suspensions.
Peer Review Status:
Awaiting Review
Subjects: Mine Engineering Technology >> Mine Geology submitted time 2025-07-17
Abstract：以深井热湿环境下矿用空冷器气侧粉尘沉积行为为研究对象，首先建立热湿环境下矿用空冷器气侧粉尘沉积模拟实验平台；其次，采用实验方法研究在热湿环境下，不同大小粉尘颗粒在空冷器气侧壁面沉积行为。研究结果表明，热湿环境下，粉尘颗粒更容易在前列沉积，随着平均粒径的增大，壁面的污垢层越厚，且沉积形态呈泥状；气侧粉尘沉积质量与进风含尘平均初始粒径的大小呈正比，与相对湿度呈反比，且粒径小于40μm的颗粒更容易沉积。该研究对于深井热湿环境下空冷器气侧的结垢产生机制以及采取合理的防、除垢措施，保障良好的矿井降温效果和安全生产具有理论指导意义。
Peer Review Status:Awaiting Review
Subjects: Mine Engineering Technology >> Mine Geology submitted time 2025-07-17
Abstract：人工制冷降温技术是目前深井热害治理的最有效的方法之一。目前降温方法以全空气型降温为主导，暴露出降温效果“近冷远热”、能耗巨大等诸多问题，与国家绿色矿山发展战略相悖离。装配式对流-辐射制冷系统是一种集支护-降温为一体的局部降温装置，可安装在工作面需冷区域，营造局部舒适热环境。为了研究装配式对流-辐射制冷系统的降温效果，采用理论分析及CFD模拟方法，得到系统供冷量的数学模型；分析系统降温机理，优化运行工况；以张双楼矿7119工作面为例对系统的降温效果展开了评价。结果表明：(1)装配式高温矿井对流-辐射降温系统与侧帮支护系统结合，可实现巷道开采、支护与环境改善同步进行，提高生产效率与环境舒适度。(2)装配式高温矿井对流-辐射降温系统最优运行工况为：冷媒流速为0.2 m/s，入口风速为0.6 m/s，出风口高度设定为60 mm，系统供冷量为269 W。(3)装配式高温矿井对流-辐射降温系统的降温效果（满足舒适需求）相较巷道全空气型降温方法提高了31%，可满足采深2000m以内采场的适应性工人舒适环境需求，系统能够最大程度保证矿工的热安全。与此同时，可根据现场的降温需求，调整设备安装间距，进行局部环境控制，极大程度节约降温能耗。该研究可用于指导矿井采场的局部环控、智能少人工作面高效精准降温、矿工职业健康保障，充分的响应了国家绿色矿山发展战略、助力国家双碳目标的实现。
Peer Review Status:Awaiting Review
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