Active lime pit is advanced in structure as it adopts reliable both-ends combined type scale sealing, making the air leakage factor below 10%.

活性石灰窑结构先进，采用可靠的回转窑两端组合式鳞片密封，使漏风系数小于10%；

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Permeability is a key factor to air leakage, its value and distribution influences greatly the distribution of air leakage. The mechanized support influence air leakage from working face to gob.

渗透率是解算采空区流场的关键参数，渗透率的变化对采空区的流场有很大的影响，而综采支架的存在，影响工作面向采空区的漏风。

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