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1、1.1矿井通风1.1.1矿井通风方案××××××矿40万t/a采选工程采矿系统因矿井出口较多，通风阻力较小，属于通风容易矿井。通风系统采用统一通风系统，通风系统设置1＃、2＃、3＃三台风机。1＃风机设置于1000东坑口，待1000中段、950中段开采完毕后将1＃风机搬迁至760m回风井口，2#风机设置于900东坑口，3#风机设置于4＃矿体回风平巷中，属于全抽出式通风。通风系统新鲜风流从各中段坑口(750m、800m、850m、900m、950m)进入坑内，经中段运输巷道、采矿进路，清洗采场工作面的废风从人行材料井、辅助斜坡道排到上一中段，由1000m(760m)、950m、900m水平排出
2、地表，通风布局见通风系统示意图。1.1.2矿井风量和阻力计算1．工作面风量计算1）按排炮烟需求计算采矿工作面主要是用无低柱分段崩落法采矿，采矿进路为独头巷到，风量按硐室型回采工作面进行计算。Q=2.3V[lg(500A/V)]/kt式中：Q——巷道型回采工作面风量，m3/s；A ——一次爆破作业的炸药量，取50kg；V——硐室空间体积，取360m3；T——通风时间，取2400s；K——风流紊乱扩散系数，取1.1；计算结果为：Q=0.93m3/s，取Q=1m3/s。2）按排尘风量计算Atpresent,wewouldliketotaketheopportunityofmaintainingp
3、artymember'sprogressivenesseducationactivity,tostrengthenandimprovetheOfficeitself.First,tostrengthenideologicalbuilding,forgebasicquality.Ideologyconstructionistheimportantcontentoftheconstructionofthecontingentofcadres. Governmentofficesatalllevelstoputideologicalconstructioninconstructionfroms
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