采空区沿空通风巷道边界漏风分布的迭代计算

为了提高计算采空区漏风流动状态的有限元计算精度,提出用迭代方法处理沿空通风巷道(或工作面)边界条件,给出了迭代格式和计算方法,针对工作面的侧漏风问题提出了工作面漏风率的概念,结合算例,从理论上证明沿程漏风巷道的风压分布(1类边界条件)是非线性的,指出在漏风量占总供风量的比例不是很大的情况下,工作面风压分布基本近似于线性分布;迭代收敛的快慢与漏风量大小有关.

Iterative algorithm of boundary air leakage in venting laneway along goaf

It is put forward that the boundary conditions in the laneway along goaf boundary(or working face) is treated with iterative method,and the iterative format and computing method is presented,in order to improve the finite element computing precision of goaf air leakage flow pattern.The concept of working face air leakage ratio is presented against the side air leakage of working face.With the calculated case,it is approved theoretically that the wind pressure distribution(boundary condition of No.1) along t...