长抽短压通风下综掘工作面粉尘分布特征研究

发布时间：2018-06-30 21:34

本文选题：长抽短压通风 + 综掘工作面　；参考：《煤炭科学技术》2017年10期

【摘要】：为了掌握长抽短压通风条件下综掘工作面的粉尘分布特征,在3个全煤巷综掘工作面分别布置粉尘浓度测点及粉尘分散度测点进行测量,得到粉尘分布特征。结果表明:掘进机司机处、掘进机后5 m处回风侧以及抽出式通风机入口处的全尘质量浓度分布范围分别为320~415 mg/m~3、200~292 mg/m~3、290~365 mg/m~3,全尘质量浓度及呼吸性粉尘质量浓度在掘进机司机处、抽出式通风机入口处较大,掘进机后5 m处回风侧较小;在掘进机司机处至掘进机后5 m的回风侧范围内,粉尘粒径分布不对称,粒径10μm的粉尘为主要粉尘,占全尘的68.99%~84.25%;从掘进机司机处至掘进机后5 m处回风侧,10μm的粉尘分散度增加,10μm的粉尘分散度减小,而各粒径的分散度变化量较小。
[Abstract]:In order to understand the dust distribution characteristics of fully mechanized driving face under the condition of long suction and short pressure ventilation, dust concentration measurement points and dust dispersion measurement points were arranged in three fully mechanized coal roadway driving faces to obtain dust distribution characteristics. The results show that the distribution range of the whole dust mass concentration at the driver's side of the roadheader, at the return air side at the back of the roadheader and at the entrance of the exhaust fan is 320,415 mg/m~3200~292 mg/m~3290~365 mg / mm3, respectively, and the total dust concentration and the respiratory dust mass concentration are at the driver's side of the roadheader. The inlet of the suction fan is larger, the return air side is smaller at 5 m after the roadheader, and the particle size distribution is asymmetric in the range from the driver of the roadheader to the return air side of the roadheader at the back of the roadheader, and the dust with the diameter of 10 渭 m is the main dust. The dust dispersion of 10 渭 m from the driver of the roadheader to 5 m after the roadheader increased by 10 渭 m and decreased by 10 渭 m, but the change of the dispersion of each particle size was relatively small.
【作者单位】：太原科技大学环境与安全学院;山西能源学院安全工程系;
【基金】：山西省科技攻关资助项目(20130322008-03) 山西省科技重大专项资助项目(20121101001) 太原科技大学校博士科研启动基金资助项目(20162019)
【分类号】：TD714.3

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