Study on determining of checked coking index for strong caking coals in Kailuan coal mining field

Based on seven strong coking coals sampled from Kailuan coal field,this paper investigated checked caking index of Kailuan coals by adjusting the blending ratio of bituminous coal and standard anthracite.It is achieved that there is good distinguishing ability for strong coking coal when the blending ratio of bituminous coal and standard anthracite is 0.7∶ 5.3,which provides a method for differentiating strong coking coal.