综采工作面粉尘粒径分布的数值模拟  

Numerical simulation of dust particle size distribution at fully mechanized working face

作　　者：李金龙[1] 吴玉庭[2] 赵益芳[3] 

机构地区：[1]山西煤炭职业技术学院,山西省太原市030031 [2]北京工业大学环境与能源工程学院,北京市朝阳区100124 [3]太原理工大学矿业工程学院,山西省太原市030024

出　　处：《中国煤炭》2014年第7期113-118,共6页China Coal

摘　　要：建立了描述综采工作面平均浓度分布和粒径分布的数学模型,应用龙贝格积分法对积分方程进行了离散化,编制了模拟计算综采工作面平均浓度分布和粒径分布的计算机程序,对实测工作面进行了模拟计算,并与实测结果进行了对比,分析了影响工作面粉尘分布的影响因素。数值模拟结果表明,工作面粉尘浓度分布与粒径分布的计算值与实测值比较一致,程序的可靠性较高;降低尘源产尘的微细粉尘含量和提高工作面平均风速可以显著降低工作面粉尘平均浓度和微细粉尘的含量;提高粉尘比重可以降低工作面粉尘平均浓度,但带来了微细粉尘含量的提高。The mathematical model of average dust concentration and particle size distribution at the fully mechanized working face was established. The integral equation was discretized by the dragon berg integral method,and a computer program was compiled for the analog computation of average dust concentration and particle size distribution at the fully mechanized working face. The analog computation was compared with the actual measured data and the influencing factors for the dust distribution were analyzed. The numerical simulation showed that the results of analog computation agreed well with the actual measured data,suggesting higher reliability of program. To reduce the fine dust from the source and enhance the average air velocity can evidently reduce the average dust concentration and fine dust amount at the fully mechanized working face. Moreover,the increased specific gravity of dust can reduce the average dust concentration,but the amount of fine dust will be increased.

关 键 词：粉尘浓度 粒径分布 数值模拟 综采工作面 

分 类 号：TD714[矿业工程—矿井通风与安全]