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为深刻认识复杂的矿井通风网路的宏观特性,以便用于控制通风,在矿井通风网路支巷中的空气动力阻力不断变化的条件下,完成了大量的模拟工作。研究出的主要结果如下: (1)可用压力损失-风量(H-Q)图求出任一网路支巷的能耗RQ~3; (2)当网路支巷R的空气劝阻力增大和主扇风量减小时,以及当第一和第二工况间主扇的风量差与第一工况下支巷R的能耗成正比时,维持高能耗支巷的相同工况对稳定主扇的运转是十分重要的。 (3)支巷q的空气动力阻力R_q与流经支巷P的风量Q_p之间的关系,可由以下经验式表示: Q_p=A(R_q/B+R_o/B)~(-n)+Q_o式中:A、R_o和Q_o——常数系数,其量纲分别为米~3/秒、公斤·秒~2/米~8和米~3/秒; n——无量纲系数;B——给定值,取为1μ,以便将括号内的值变为无量纲值。
In order to deeply understand the macroscopic characteristics of complex mine ventilation networks so as to be used for controlling ventilation, a great deal of simulation work has been completed under the condition of the aerodynamic resistance changing constantly in mine ventilation network branches. The main results are as follows: (1) The energy loss RQ ~ 3 of any branch roadway can be obtained by pressure loss-air volume (HQ) graph; (2) When the air volume decreases, and when the air volume difference between the main fan between the first and second operating conditions is proportional to the energy consumption of the branch roadway R in the first condition, the operation of the stable main fan is maintained under the same operating conditions of the high-energy consumption branch roadway It is very important. (3) The relationship between the aerodynamic resistance R q of branch road q and the air flow Q p through the branch road P can be expressed by the following empirical formula: Q_p = A (R_q / B + R_o / B) ~ (-n) + Q_o Where: A, R_o and Q_o - constant coefficient, the dimensions were m ~ 3 / s, kg · sec ~ 2 / m ~ 8 and m ~ 3 / The given value, taken as 1μ, changes the value in parentheses to a dimensionless value.