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一、系统的选择 影响系统选择的因素如下: a)工作地点深度;b)至工作地区妁距离;c)巷道长度及横断面;d)与其它工作区的联络状况,如前进式工作面的联结点;e)涌水量;f)区段及巷道坡度;g)瓦斯量;h)粉尘;i)有害气体如酸性气、炮烟等的存在情况;j)前进速度。 压入通风系统向工作面提供新鲜空气,冲淡工作面的有害气体防止高浓度沼气出现。可是,工作面产生的粉尘随风流吹向操作工人,恶化了工作条件,尤其是对掘进头的机械操作手危害更甚。抽吸系统采用在管道头部加装吸尘器的办法解决这一问题,防止大部分粉尘被带入回风风流中。不过,应该注意不要让高浓度瓦斯经过风扇。
First, the choice of system Factors that affect the system selection are as follows: a) the depth of the work place; b) the distance to the work area; c) the length and cross-section of the roadway; d) the contact with other work areas, Junction; e) water inflow; f) section and roadway slope; g) gas volume; h) dust; i) the presence of harmful gases such as sour gas and gunfire; Pressed into the ventilation system to provide fresh air to the face, dilute the work of harmful gases to prevent the emergence of high concentrations of biogas. However, the dust generated by the work surface is blown to the workers with the wind, worsening the working conditions, especially to the mechanical operators of the driving head. The suction system adopts the method of installing a vacuum cleaner on the pipe head to solve this problem and prevent most of the dust from being brought into the return air flow. However, care should be taken not to allow high concentrations of gas to pass through the fan.