不规则巷道断面风速分布规律数值模拟

Numerical Simulation of Wind Velocity Distribution in Irregular Roadway

摘要: 为明确不规则巷道断面的风速分布规律，支撑井下通风系统优化与安全监测，本研究采用数值模拟方法(借助Fluent软件)，构建含半圆凸体的模型模拟巷道壁面不规则性，分析半圆拱规则/不规则断面在不同条件下的风速分布特征。结果显示：规则断面巷道的风速与壁面距离符合对数函数关系(相关系数R²为0.9681~0.9762)，其平均风速点距巷帮/顶底板的距离为巷道宽度/高度的0.11倍；不规则断面的风速分布趋势与规则断面一致，拟合相关系数R²达0.9892~0.9962，平均风速点距壁面的距离为巷道宽度/高度的0.1倍。本研究明确了不同断面巷道的平均风速点分布规律，为井下风速传感器布置及测风作业提供了理论依据，对提升矿井通风安全管理水平具有支撑作用。

Abstract: In order to clarify the wind speed distribution law of irregular roadway section and support the optimization and safety monitoring of underground ventilation system, this study used numerical simulation method (with the help of Fluent software) to construct a model with semi-circular asperity to simulate the irregularity of roadway wall, and analyzed the wind speed distribution characteristics of regular/irregular sections such as semi-circular arch and trapezoid under different conditions. The results show that the relationship between the wind speed and the wall distance of the regular section roadway conforms to the logarithmic function (the correlation coefficient R² is 0.9681~0.9762), and the distance between the average wind speed point and the roadway side/roof and floor is 0.11 times the width/height of the roadway. The wind speed distribution trend of the irregular section is consistent with that of the regular section, and the fitting correlation coefficient R2 is 0.9892~0.9962. The distance between the average wind speed point and the wall surface is 0.1 times the width/height of the roadway. This study clarifies the distribution law of average wind speed points in different cross-section roadways, provides a theoretical basis for the arrangement of underground wind speed sensors and wind measurement operations, and plays a supporting role in improving the safety management level of mine ventilation.