矿井风机选型计算.doc

。矿井主要风机选型计算一、矿井风量计算按下列要求计算，并必须取其中最大值。（一）按井下同时工作的最多人数计算Q=4NK式中Q矿井总供风量，m/min； N井下同时工作的最多人数； 4每人每分钟供风标准，m/min； K矿井通风系统，包括矿井内部漏风和分配不均匀等因素,取1.2.Q=4701.2=336 m/min(二)按采煤、掘进、硐室等处实际需风量计算Q=（Q采+Q掘+Q硐+Q它）Km1 采煤工作面需风量计算按瓦斯涌出量计算Q采=100q采Kc=1001.3382.0=267.6 m/min按工作面面温度计算Q采=60VcScKi=601.23.851.1=305 m/min按炸药使用量计算Q采=25Ac=252.75=68.75 m/min按工作面人员计算Q采=4nc =412=48 m/min按风速验算回采工作面风量应满足：15ScQ采240Sc153.85=57.75 m/min2403.85=924.00 m/minQ采取305 m/min符合要求.2.掘进工作面风量计算按瓦斯涌出量计算Q掘=100q掘kd=1000.3922=78.4 m/min按炸药使用量计算Q掘=25A =254.8=120 m/min按局部通风机吸风量计算Q掘=QfIkf=25011.2=300 m/min按工作面人员计算Q掘=4nj=48=32 m/min按风速进行验算按煤矿安全规程规定煤巷、半煤巷掘进工作面的风量应满足： 15SjQ掘240Sj 155. 263001262.4Q掘取300 m/min符合要求.3.硐室需风量计算井下爆破材料库取80m/min井下中央变电硐室取150m/min消防材料库取80m/min4.其它巷道需风量计算Q它=(2305+3300+310)5=19205=96 m/min5.矿井通风系数Km取1.2Q=（Q采+Q掘+Q硐+Q它）K =(2305+3300+310+96)1.2 =(610+900+310+96)1.2 =2300 m/min矿井需风量取2300 m/min。二、 矿井通风总阻力计算井巷通风阻力计算巷道名称支护方式摩擦系数(N.S/m4)巷道长度L(m)断面净周长P(m)净断面S(m)S(m)风量Q(m/s)Q(m/s)风速V(m/s)阻力H(Pa)+885大巷砌碹锚喷0.006717509.286.03219.338.331469.4728.923采区皮带巷金支0.02457009.455.26145.512.2148.8165.723S采面单体0.0461309.23.8557.16.137.235.823S回风巷金支0.02456008.54.485.26.137.254.623采区+885风巷金支0.02452609.04.697.36.137.221.9 +885m五煤巷砌碹0.00451808.85.37154.912.2148.86.922五煤车场砌碹0.00451009.45.4157.520.32412.911.1+885m五煤巷砌碹0.00452408.85.37154.920.32412.925.3三上山锚喷0.00852009.25.28147.238.331469.4156.1+920m回风巷锚喷0.00852009.25.28147.238.331469.4156.1技改回风上山金支0.024551010.16.0216.038.331469.4858.5总回风平巷砌碹0.0045609.286.03219.338.331469.416.8总回风上山锚喷0.00851809.286.03219.338.331469.495.1引风平巷砌碹0.0045308.85.37154.938.331469.411.3合计2344.1局部阻力2344.115=351.6Pa总阻力2344.1+351.6+80=2775.7Pa h=RQ=1.889Q井巷通风阻力计算巷道名称支护方式摩擦系数(N.S/m4)巷道长度L(m)断面净周长P(m)净断面S(m)S(m)风量Q(m/s)Q(m/s)风速V(m/s)阻力H(Pa)+885大巷砌碹锚喷0.006717509.286.03219.320.33413.4205.1+885一车场砌碹锚喷0.006710011.58.57629.420.33413.45.1+885大巷砌碹0.00455209.286.03219.312.2148.814.7+885大巷锚喷0.008513809.286.03219.312.2148.873.9+885二车场锚喷0.00859011.58.57629.412.2148.82.1尾采区皮带巷金支0.02457009.455.26145.512.2148.8165.7尾采区采面单体0.0461309.23.8557.16.137.235.8尾采区北回风巷金支0.02456008.54.485.26.137.254.6尾采区回风平巷金支0.02452608.85.37154.96.137.213.5+885五煤回风巷锚喷0.008513409.286.03219.312.2148.871.7三上山锚喷0.00852009.25.28147.220.33413.443.9+920m回风巷锚喷0.00852009.25.28147.220.33413.443.9技改回风上山金支0.024551010.16.0216.020.33413.4241.5总回风平巷砌碹0.0045609.286.03219.320.33413.44.7总回风上山锚喷0.00851809.286.03219.320.33413.426.8引风平巷砌碹0.0045308.85.37154.920.33413.43.2合计1006.2局部阻力1006.20.15=150.93Pa总阻力1006.2+150.93+80=1237.13Pa h=RQ=2.993Q井巷通风阻力计算巷道名称支护方式摩擦系数(N.S/m4)巷道长度L(m)断面净周长P(m)净断面S(m)S(m)风量Q(m/s)Q(m/s)风速V(m/s)阻力H(Pa)+885大巷砌碹锚喷0.006717509.286.03219.338.331469.4728.9+885一车场砌碹锚喷0.006710011.58.57629.438.331469.418.0+885大巷砌碹0.00455209.286.03219.330.2912.090.3+885大巷锚喷0.008512109.286.03219.330.2912.0396.9+885大巷锚喷0.00853609.286.03219.318.032441.9+885五煤回风巷锚喷0.00852609.286.03219.318.032430.3+885五煤回风巷锚喷0.008512109.286.03219.330.2912.0396.9三上山锚喷0.00852009.25.28147.238.331469.4156.1+920m回风巷锚喷0.00852009.25.28147.238.331469.4156.1技改回风上山金支0.024551010.16.0216.038.331469.4858.5总回风平巷砌碹0.0045609.286.03219.338.331469.416.8总回风上山锚喷0.00851809.286.03219.338.331469.495.1引风平巷砌碹0.00453