在执行新煤炭分类中需要明确的几个问题

Problems to be clarified in implementing new coal classification system

本文进一步明确了新煤炭分类的适用范围,哪些煤种属于炼焦煤;哪些指标具有直线可加成性;煤田地质勘探和生产矿井中如何确定煤质牌号;怎样才能使粘结指数的测值准确可靠等具体作法。

the paper made clear the scope of application of the new coal classification system. It is only applicable, in principle,to a single coal seam. What belonges to coking coals? In addition to gas coal,fat coal, coking coal and lean coal, strongly caking coal or gas-fat coal with equivalent caking properties, 1/3 coking coal, 1/2 moderately caking coal and meagure-lean coal belong to coking coals.What are the indices which indicate linear formability?Long-term experiments have shown that the volatile matter,v^r, and hydrogen content, H^r, of d.a.f based coal, which represent metamorphism of coal, and the maximum thickness of plastic layer, y, which indicates the caking property of bituminous coal are three main indices which have marked linear formability.How to acertain rank of coal in coalfield geological exploration and in productive mine? It is based on volatile matter, vr , caking Index, G_(RI), etc. Finally, the paper mentioned the points of attention and operating method in determining caking index, G_(RI).