永城背斜两翼煤层煤质及其后期改造特征分析

摘要

The main coal seam is distributed in the two limbs of Yongcheng anticline in Yongxia coal mining area of Henan province. It has great changes affected by the late folds and fault structure and magmations. The coal is mainly of anthracite (WY), then lean coal (PM), and a small amount of meager-lean coal (PS) and a tiny amount of natural coke (TR).The main physical and chemical properties of coal seam are stability. The main characteristics is low ash, low sulfur, low phosphorus, low moisture, high calorific value, low ash melting, easy to grind and select. Influenced by the late magmatic activity, coal seam coal quality changed, as its physical and chemical properties index changed in later reformation, and it metamorphosed into natural coke.%河南省永夏煤炭矿区主要煤层分布在永城背斜两翼，受后期褶皱、断裂构造、岩浆活动影响而发生较大变化。煤层以无烟煤（WY）为主，贫煤（PM）次之，还有少量的贫瘦煤（PS）及分布有少量的天然焦（TR）。主要煤层物理化学性质稳定，以低灰分、特低硫、特低磷、低水分、高发热量、低熔灰分、易磨碎、极易选为主要特征。受后期岩浆活动影响，煤层煤质发生变化，其物理化学性质指标发生后期改造而发生变化，并变质为天然焦。