论文部分内容阅读
本文介绍一种解算矿井通风网路的新方法,称之为平均风量逼近法.在数学计算上它不同于过去已有的方法,当然它们都要遵守矿井通风的阻力定律及闻名的克希柯夫定律.平均风量逼近法是用以解算通风网路的自然风量分配.包含m个分支和n个节点的网路,要确定m个风量,所以必须解算m个方程式.m个方程式包括(n-1)个按克希荷夫第一定律建立的节点方程式,及(m-n+1)个按克希柯夫第二定律建立的网孔方程式.网孔方程式中的风压用hi=R_iQ_i′Q_i″表示的阻力定律代替.各分支的初始风量Q_i′任意假定,另一个风量Q_i″可解算网孔方程式求得.取Q_i′和Q_i″的平均值,作为下一次迭代的Q_i′,另一个Q_i″又一次从网孔方程式求得.按上述重复计算,直至所有网孔的风压平衡到所要求的精度为止.采用手工进行这些重复计算工作是很枯燥无味的,而且消磨时间,所以编制了计算机程序.本方法的优点是对初始风量可任意假定,迭代次数少,精度高,井易于掌握.
This paper presents a new method to solve the mine ventilation network, called the average wind approximation method, which is different from the mathematically calculated methods, of course, they must comply with the law of mine ventilation resistance and the famous Kirsch Koff's law.The method of average air flow approximation is used to solve the natural air flow distribution of the ventilation network.It contains m branches and n nodes of the network, to determine the m air volume, so you must solve m equations.m equation Including (n-1) node equations established by Kirchhoff's first law, and (m-n + 1) mesh equations established by Kirchkev's second law. Wind pressure in the mesh equation The resistance law of hi = R_iQ_i'Q_i “is replaced by the initial air volume of each branch Q_i ', and the other air volume Q_i” can be solved by calculating the cell equation, taking the average of Q_i' and Q_i “as the next time The iterative Q_i 'and the other Q_i ”are again calculated from the mesh equation. Repeat the above calculation until the wind pressure balances all mesh cells to the required accuracy. These manual calculations are dull and boring, And kill time, so the preparation of a computer program The advantage of this method is that the initial volume of air can be assumed arbitrarily, the number of iterations is small, the precision is high, and the well is easy to grasp.