crop coal

crop coal

[′kräp ‚kōl]
(mining engineering)
Coal of inferior quality found near the surface.
References in periodicals archive ?
The Accelerator with a screening system improved coal quality and the ability to process multiple seams of coal to a controlled top size, which could be blended with or without washed and/or crop coal to meet the specifications of utilities and industrial customers.
In addition, crop coal and what Ritchie refers to as BV rations, which are low in sulfur, calorific value and ash, are also available for blending with higher sulfur coals to produce a lower sulfur product.