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现代化矿井中,巷道构成一种复杂的连接,知道了每条支路的风阻后,只有应用电子计算机或专用模拟计算机才能完成整个网路解算。到目前为止,进行负压测量后,才能获得这种资料。而这种测量则要花160～180个工,需时达1.5～2个月之久。在此期间,巷道在矿压作用下要变形。顿涅茨煤炭科学研究所查明,仅由于巷道横断面改变,其阻力就增大2～3倍,有时更高。此外,矿井通风网路也不是固定的,一部分巷道报废,同时又开掘出新的巷道,使得负压测量所得到的资料日趋陈旧。
In modern mines, the tunnels form a complex connection. Knowing the wind resistance of each branch, only the application of an electronic computer or a dedicated simulation computer can complete the entire network solution. So far, this information has been obtained after negative pressure measurements have taken place. This measurement will take 160 to 180 workers, take up to 1.5 to 2 months. During this period, the roadway was deformed under the action of the rock pressure. The Donets Coal Research Institute found that the resistance increased only 2 to 3 times and sometimes higher only due to changes in the cross-section of the roadway. In addition, mine ventilation network is not fixed, part of the roadway scrapped, at the same time digging out a new roadway, making the negative pressure measurement data obtained by the increasingly obsolete.