Novel oxygen-enrichment method using annular air curtain for single-head roadway of plateau mine
作者机构：School of Resources&Safety EngineeringCentral South UniversityChangsha 410083China
出 版 物：《Building Simulation》 (建筑模拟（英文）)
年 卷 期：2023年第16卷第7期
页 面：1097-1113页
核心收录：
学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0813[工学-建筑学] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）]
基 金：supports of the National Natural Science Foundation of China(No.52274247) the Postgraduate Scientific Research Innovation Project of Hunan Province(No.CX20220196)
主 题：plateau mine heading face oxygen enrichment air curtain CFD method
摘 要：The low-oxygen environment restricts the exploitation of mineral resources on plateaus and affects miner’s *** paper proposes an oxygen-enrichment method using an annular air *** numerical simulation and experiments,it was confirmed that the proposed method improves the breathing environment in the single-head roadway of a plateau *** fluid dynamics(CFD)was used to investigate the oxygen-enriching effect and oxygen spatial distribution regularities after using the proposed oxygen-enrichment method in the single-head roadway of a plateau *** reliability of the CFD model was confirmed by *** testing was conducted to investigate the influence degree and optimal level combination of factors influencing oxygen *** results demonstrate that the annular air curtain effectively prevented oxygen loss,thus forming a local oxygen-rich space and improving the effective utilization rate of *** supply concentration and velocity are positively correlated with the oronasal oxygen mass fraction through a linear function,while the air curtain outlet wind velocity is negatively correlated with the oronasal oxygen mass fraction through a linear *** annular air curtain diameter and oronasal oxygen mass fraction do not have an obvious functional *** the annular air curtain diameter was greater than 0.9 m,the oronasal oxygen mass fraction was stable at approximately 25.30%.The influencing factors of the novel oxygen-enrichment method are,in descending order,as follows:oxygen supply concentration,annular air curtain diameter,air curtain outlet wind velocity,and oxygen supply *** optimal level combination is oxygen supply concentration of 100%,oxygen supply velocity of 11 m/s,air curtain outlet wind velocity of 1.5 m/s,and annular air curtain diameter of 0.9 m.
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