摘要
以9煤层为例，从平面上对乌达矿区主采煤层的可选性及其聚煤环境进行了讨论.结果表明，乌达矿区主采煤层的可选性在平面上分布的差异较大，这受控于泥炭聚积时的古环境.低位泥炭沼泽由于潜水位较高，水流对泥炭沼泽表面的改造和冲刷作用较强，形成的煤层具有较高的凝胶化指数(IG)和地下水流动指数(IGW)，并且与精煤产率呈负相关，煤中粘土矿物和黄铁矿难以洗选；高位泥炭沼泽形成的煤层具有较低的凝胶化指数(IG)和地下水流动指数(IGW)，泥炭积累速度较快，其精煤的产率较高.
The washability and the coalforming environment of No.9 coal seam in Wuda coalfield were studied. The results show tha t the washability of the coal is quite different from one coal mine to another, indicating a different paleoenvironment of peat accumulation. Because of a high groundwater level and a strong erosion action, the coal formed in a low peat swamp is great in gelatification index (IG) and in groundwa ter index (I GW), which are in a negative correlation to the ratio of clean coal recove ry. While for the high peat swamp, IG and IGW are small, corresponding to a high ratio of clean coal recovery.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2000年第3期249-252,共4页
Journal of China University of Mining & Technology
基金
煤炭科学基金!(97地10205)
关键词
可选性
聚煤环境
精煤产率
煤层
地质因素
煤矿
washability
coal accumulation environment
clean coal recover y
gelatification index
groundwater influence index
