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随着掘进机械化程度的提高,掘进产尘量大大增加,综掘工作面的粉尘浓度有时高达1300～4000毫克/米~3,严重危害矿井安全生产和工人的健康。目前我国煤矿巷道掘进普遍采用压入式通风。这种通风方式对综掘工作面远远达不到除尘的要求。抽出式通风方式由于存在一些生产实际中尚未解决的具体问题,如粉尘在风筒中的沉降,水蒸气在风筒中的凝聚,长距离风筒的漏风,局扇风机的能力等,因而也难于在长距离掘进中应用。煤科院重庆所对长抽短压混合式通风方式进行了排尘试验,试验结果表明,排尘效果良好。但目前对长压短抽通风方式除尘效果的研究还不多,对其通风除尘的系统和最优参数的研究更为少见。为此,我们进行了长压短抽混合通风方式的模型试验。
With the improvement of tunneling mechanization, the amount of dust produced during excavation greatly increases. The dust concentration of fully mechanized excavation surface is sometimes as high as 1300-4000 mg / m3, seriously damaging mine safety and workers’ health. At present, coal mine tunnels are generally driven by pressure ventilation. This ventilation method fully mechanized digging face can not meet the requirements of dust removal. Extractive Ventilation Due to some practical problems that have not yet been solved in practice, such as the settlement of dust in the air cylinder, the condensation of water vapor in the air cylinder, the air leak in the long-distance air cylinder, the capacity of the fan, etc., Long-distance driving in the application. Coal Institute of Chongqing on the long pumping short-pressure mixed ventilation were dust test, the test results show that dust removal effect is good. However, there are not many researches on the dust removal effect of long-short-short-draft ventilation, and the research on the system and optimal parameters of ventilation and dust removal is even rarer. To this end, we conducted a long-short mixed pumping ventilation test model.