瓦斯管路流量计算表

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1、瓦斯管路流量计算表中梁山煤电气有限公司矿业分公司北矿通风队使用说明：1.本表根据水力学公式推出井下瓦斯管路流量公式为：按此公式计算出混合瓦斯流量。2.将测得的管路动压（公厘水柱）和瓦斯浓度值于表内查找出相应的混合瓦斯流量，再乘以瓦斯浓度，即得纯瓦斯量，m3/min。3.本表适合目前井下抽放情况，若个别从表中查不到相应的数据时，则可用上述公式在附表中查相应混合瓦斯容重r代入公式，即可计算出混合流量。我矿瓦斯管主要巷道平均流速值（用中心点测法）测定地点动压范围ReN平均流速m/min钻场0.10－0.50160006.90.814Vmax0.50－

2、1.001090007.30.832Vmax各异支管1.00－3.00899306.90.81443.00－7.001421907.40.8252泵站10.82313.00－5.001107707.90.83485.10－7.002336448.10.83841985.11.1不同管径断面积　　附表2管径寸2寸4寸6寸8寸12寸毫米50100150200300断面积米20.0020.0080.0180.0320.071不同沼气浓度与空气混合气体的容重r值（在20℃和760mmHg时）（单位：公斤/米3）　　　附表1沼气浓度%1123456789

3、01.205001.199631.194261.188891.183251.178151.172781.167411.162041.15667101.151301.145931.140561.135191.124821.24451.119081.114011.108341.10297201.097601.092231.086861.081491.076121.070751.065381.060011.054641.04927301.043901.038531.0331610.27791.022421.017051.011681.006311.0

4、00940.99557400.990200.984830.979460.974090.968720.963350.957980.952610.947240.94187500.93650.931130.925760.920390.915020.909650.904280.898910.893540.88817600.882800.871430.872060.866690.861320.855950.850580.845210.839840.83447700.829100.823730.818360.812990.807620.802250.796

5、880.791510.786140.78077800.775400.770030.764660.759290.753910.748550.743180.737810.732440.72707900.721700.716330.710960.705590.700220.694850.743180.737810.737810.732441000.66800r=1.205-0.537*CH4%2寸管混合瓦斯流量表浓度%　　流　量　m3/min动压mmHg20-2525-3030-3535-4040-4545-5050-5555-6060-6565-7

6、070-7575-8080-8585-900.01-0.050.0820.0830.0840.0850.0860.0870.0880.0900.0910.0930.0940.0960.0980.0990.05-0.100.1420.1420.1440.1470.1490.1510.1540.1560.1580.1610.1630.1660.1690.1720.10-0.150.1830.1830.1850.1900.1930.1950.1990.2010.2040.2070.2110.2140.2180.2220.15-0.200.2160.2

7、160.2190.2250.2280.2310.2350.2380.2420.2450.2490.2540.2580.2630.20-0.250.2450.2450.2490.2550.2590.2620.2670.2700.2740.2780.2830.2880.2930.2980.25-0.300.2710.2710.2750.2820.2860.2900.2950.2980.3030.3080.3100.3180.3240.3290.30-0.350.2950.2950.2990.3070.3110.3150.3200.3240.3290

8、.3350.3400.3460.3520.3580.35-0.400.3170.3170.3210.3290.3340.3380.3440.3480.