张家峁煤矿综采工作面粉尘综合防治技术

Integrated Dust Control Technology for Fully Mechanized Coal Mining Face in Zhangjiamao Coal Mine

随着煤矿机械化程度的不断提高,粉尘灾害问题日趋突出。为改变张家峁煤矿14201综采工作面粉尘浓度高的现状,提高防尘效果,利用数值模拟和现场实验,进行了工作面粉尘综合防治技术研究。研究结果表明:通过煤层注水,煤层水分平均增加了78. 1%;对工作面风流分布数值模拟发现风流驱散降低粉尘浓度作用显著,现场实测确定工作面的最佳通风除尘风速为1. 3～1. 5m/s;实施综合降尘措施后,该工作面呼吸性粉尘浓度由7. 68mg/m^3降低至2. 26mg/m^3,降幅70. 6%;总粉尘浓度由14. 41 mg/m^3降低至4. 37mg/m^3,降幅69. 7%。通过"源头治理和过程控制"的综合防尘策略,实现了矿井综合防尘一体化,降低了生产作业场所的粉尘浓度,矿井粉尘超标现象得到了有效控制。

With the continuous improvement of mine mechanization,the dust hazard in coal mines is becoming increasingly prominent. In order to change the present situation of high dust concentration in 14201 fully mechanized mining face of Zhangjiamao Coal Mine and improve the dust prevention effect,the comprehensive dust control technology in working face was studied by numerical simulation and field experiment. The results show that: through coal seam water injection,the average increase of coal seam moisture is 78. 1%;the numerical simulation of airflow distribution in working face shows that the effect of airflow dispersion on reducing dust concentration is remarkable,and the best airflow velocity of ventilation and dust removal is 1. 3 ~ 1. 5 m/s. The concentration of respirable dust in the working face was reduced by 70. 6% from 7. 68 mg/m^3 to2. 26 mg/m^3 and the total dust concentration by 69. 7% from 14. 41 mg/m^3 to 4. 37 mg/m^3,after implementing comprehensive dust control measures. Through the comprehensive dust control strategy of'source control,process control',the integration of mine comprehensive dust control has been realized,the dust concentration in production and operation sites has been reduced,the dust hazard has been effectively controlled.