By using this model the soil-water characteristics and permeability coefficient of unsaturated soil are deduced and expressed in fractal dimension and air-entry value.
本文建立了土体孔隙分布的分形模型，导出用分维和进气值表示的水分特征曲线和渗透系数的理论表达式。
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。
For optimized fly ashes, specific surface value determined by air permeability method is more desirable than fineness value by sieve analys...
对于优化粉煤灰，用透气法测定其比表面积比用筛析法测定的细度，更适宜于表征粉煤灰的品质。
For optimized fly ashes, specific surface value determined by air permeability method is more desirable than fineness value by sieve analys...
对于优化粉煤灰，用透气法测定其比表面积比用筛析法测定的细度，更适宜于表征粉煤灰的品质。
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