李沟井田二_1煤层可选性评价

Washability Evaluation of Coal Seam Ⅱ_1 in Ligou Mine Field

在分析了李沟井田煤层煤质特征的基础上,利用筛分试验和浮沉试验研究了该井田二1煤层的可选性。研究结果表明,二1煤层的自然粒度13~0.5mm粒级的占62.30~75.96%,平均68.18%;当二1煤层浮煤灰分为10%时,其可选性等级为难选—极难选;当二1煤层浮煤灰分为13%时,其井田大部分地段可选性等级易选,局部为极难选。

On the basis of the coal quality characteristics, the screening and float-and-sink tests have been carried out to investigate the washability of the coal seam II1 in the Ligou mine field. The results showed that coal seam II1 in the natural grain size of 13~0.5mm size accounted for 62.30 ~ 75.96%, averaged 68.18%. When the float coal ash was 10%, washability of coal seam II1 was refractory and very refractory coal. When the float coal ash was 13%, washability of coal seam II1 was easy to dress coal in most of section and very refractory coal in local.