The effective coefficient of screening was used as a new index to comprehensively appraise screening performance.
研究了利用扩孔筛分提高筛分效率的方法，结果表明：在允许少量误筛时，扩孔筛分法无论在平面筛上，还是在圆筒筛内都是完全可行的；它具有快速、高效等特点，能够极大地提高物料筛分的效率；并根据扩孔筛分法的特点，提出了一个综合评价指标——筛分有效系数，为扩孔筛分的合理选取及评价筛分方案的好坏提供了依据和手段。
Under the same experiment conditions,coal samples with different screening modulus were tested on expansion energy of initial released gas,and then we found out the increased exponential relationship between the screening modulus and the expansion energy of initial released gas.
通过在同一试验条件下,对不同破碎程度(不同筛分模数)的煤样进行初始释放瓦斯膨胀能实验研究,得出了初始释放瓦斯膨胀能和筛分模数之间存在着指数增加的关系。