基于CFD的风流影响下综采面粉尘沿程污染机制  

Dust Pollution Mechanism in Fully Mechanized Mining Face under Influence of Airflow Based on CFD Method

作　　者：王磊 魏伟 刘旭东 侯传根 于海明[3] WANG Lei;WEI Wei;LIU Xudong;HOU Chuangen;YU Haiming(Xinjiang Energy Co.,Ltd.,National Energy Group,Urumqi 830000,China;China Coal Technology and Engineering Group Chongqing Research Institute Co.,Ltd.,Chongqing 400037,China;School of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]国家能源集团新疆能源有限责任公司,乌鲁木齐830000 [2]中煤科工集团重庆研究院有限公司,重庆400037 [3]山东科技大学安全与环境工程学院,山东青岛266590

出　　处：《煤炭技术》2022年第4期104-108,共5页Coal Technology

摘　　要：为了摸清单滚筒采煤工作面粉尘扩散污染规律,针对乌东煤矿B3-6综采工作面,采用ANSYS FLUENT软件构建了风流-粉尘两相耦合数学模型,对0.5~2.0 m/s进风风速影响下粉尘扩散污染规律进行仿真分析。结果表明:当进风风速为0.5 m/s时,滚筒处的煤块诱导风流致使部分风流流入人行道区域,风速达到1.40 m/s;当进风风速增加至1.5 m/s时,滚筒部分的风流很少直接进入人行道区域,同时高浓度粉尘被风流迅速稀释,采煤机下风侧呼吸带粉尘浓度整体趋势为逐渐增加后稳定,粉尘浓度基本低于200 mg/m^(3),可有效抑制截割粉尘向有人作业区的人行道扩散污染。通过现场实测发现,粉尘浓度相对误差均小于17.3%,可认为数值模型相对准确。In order to find out the dust diffusion pollution law of single drum coal face,adopted ANSYS FLUENT software to build airflow-dust two-phase coupling mathematical model in B3-6fully mechanized mining face of Wudong coal mine,and made simulation analysis on the dust diffusion pollution law under the influence of 0.5-2.0 m/s inlet air speed.The results showed that when inlet air speed was0.5 m/s,the airflow induced by coal at the roller led part of the airflow into the sidewalk area,and the air speed reached 1.40 m/s;when the air speed increased to 1.5 m/s,the airflow in the drum part rarely directly entered the sidewalk area,and the high-concentration dust was rapidly diluted by the airflow at the same time.The overall trend of dust concentration in the breathing zone on the downwind side of the shearer was gradually increased and then tend to be stable,and the dust concentration was basically lower than 200 mg/m^(3),which can effectively inhibit the diffusion pollution of cutting dust to the sidewalk in manned operation areas.Through field measurement,it was found that the relative error of dust concentration was less than 17.3%,which can be considered that the numerical model was relatively accurate.

关 键 词：综采工作面 数值模拟 粉尘污染 单滚筒采煤 进风风速 

分 类 号：TD714[矿业工程—矿井通风与安全]