矿井复杂风网灵敏度求解及其稳定性分析

Sensibility Calculation and Stability Analysis on a Complicated Mine Ventilation Network

为便于计算复杂风网的灵敏度,分析了矿井风网灵敏度和基于灵敏度的风网稳定性的概念,给出了用解析法求解灵敏度的公式,并使用Microsoft Visual C++编制灵敏度计算程序。引入分支风阻易变性系数,优化了基于灵敏度的稳定性计算方法。采用实例分析了灵敏度衰减规律,得出通风构筑物越多系统稳定性越强的结论,这与经验明显不符。针对此矛盾结论,阐明了基于通风构筑物分析与基于灵敏度的稳定性是从风阻的突变与波动两个级别对通风系统稳定性的不同定义,并明确了两种稳定性的重要程度。研究结果有利于正确使用基于灵敏度的风网稳定性进行通风方案优选。

In order to make sensibility calculation for a complicated mine ventilation net work easier, the concept of sensibility and stability of a ventilation network were analyzed. An analytic formula to determine the sensibility was put forward. Furthermore, Microsoft Visual C＋＋ sot）ware was employed to generate a sensibility calculation program. By introducing mutability coefficient of branches, the calculation method of stability based on the sensibility was optimized. A ease was adopted to analyze the attenuation rule of sensibility. And the conclusion is that the more the ventilation constructs are, the more stable the ventilation system is, and it obviously disagrees with the experiences. Aiming al this contradict conclusion, it is pointed out that the definitions of stability in a ventilation system are different while based on the ventilation constructs or on the sensibility. The ventilation construets are always resulted in the sudden change of air resistance, however, the sensibility always aims at a little change of air resistance. It is also pointed out that ventilation constructs play an even more important role in the ventilation stability. The research result is propitious to optimal choice of projects during the coal mine＇s ventilation design and reformation.