Operating conditions of numerical simulations.

Thermal damage from heat sources severely affects the safety of deep mine production. Heat and mass transfer between heat sources and airflow leads to the increase of the airflow temperature (AFT), moisture content of airflow (AFMC) and relative humidity of airflow (AFRH). This study aims to quantify uncertainty contributions of the working face parameters on AFT, AFMC and AFRH and find their main contributors. The flow, geometric and physical parameters are chosen as uncertainty sources. Subsequently, Sobol indices are obtained using the point-collocation non-intrusive polynomial chaos method, denoting the sensitivity of each input parameter. It was found that the inflow wind temperature and the wind velocity are two top factors influencing AFT and AFMC, while relative humidity of inflow wind and the wind velocity are two top factors influencing AFRH. In the single factor analysis, the uncertainty contributions of the inflow wind temperature on AFT and AFMC, and relative humidity of inflow wind on AFRH can exceed 0.7, which is higher than those of the wind velocity. The geometric parameters of the working face, namely the length, width and height, and ventilation time are also significant quantities influencing AFT, AFMC and AFRH. Compared to AFT and AFMC, two other significant quantities influencing AFRH are the thermal conductivity of coal and the original temperature of the rock.

热源引发的热损害严重威胁深井开采作业的安全。热源与气流之间的传热传质过程会导致气流温度（Airflow Temperature, AFT）、气流含湿量（Airflow Moisture Content, AFMC）以及气流相对湿度（Airflow Relative Humidity, AFRH）升高。本研究旨在量化工作面参数对AFT、AFMC与AFRH的不确定性贡献，并明确其主要影响因素。研究选取流动参数、几何参数与物理参数作为不确定性来源。随后，采用点配置非侵入式多项式混沌方法求解索博尔灵敏度指数，用以表征各输入参数的灵敏度。研究发现，入风温度与风速是影响AFT与AFMC的两大核心因素，而入风相对湿度与风速则是影响AFRH的两大核心因素。在单因素分析中，入风温度对AFT与AFMC的不确定性贡献、入风相对湿度对AFRH的不确定性贡献均可超过0.7，高于风速的贡献值。工作面的几何参数，即长度、宽度与高度，以及通风时长同样是影响AFT、AFMC与AFRH的重要参数。相较于AFT与AFMC，另外两个影响AFRH的关键参数为煤炭导热系数与岩体初始温度。