彬长矿区4号煤层煤质特征及洁净等级划分

为实现彬长矿区优质煤炭资源的清洁高效利用,在对彬长矿区以往勘查钻孔的煤质化验资料统计分析的基础上,系统分析了该矿区主采煤层4号煤的煤岩、煤质特征,论述了硫分、灰分、挥发分、发热量和有害微量元素的分布规律,依据最新煤炭资源潜力评价提出的煤炭洁净等级6级划分方案,选用灰分、硫分、有害元素(F、Cl、As及Pb)6个评价指标对矿区内4号煤层的煤炭资源洁净等级进行了初步划分。彬长矿区4号煤层以低硫、低中灰、中高挥发分、特高热值不黏煤为主,局部含小范围的弱黏煤,彬长矿区4号煤层原煤洁净等级为Ⅲ级,属较好洁净煤;浮煤洁净等级为Ⅱ级,属好洁净煤。整个矿区内4号煤层原煤洁净等级以Ⅲ级较好洁净煤为主,分布区占矿区面积的73.03%,仅在矿区西部洪家镇—巨家镇一带和中东部出现小范围的Ⅳ级中等洁净煤分布区,面积占比为26.97%。

Characteristics and cleanliness class of Binchang mining area No.4 coal seam

In order to use Binchang coal efficiently and cleanly,the coal rock and coal quality characteristics of the main mineable coal seam No.4 coal seam were systematically analyzed based on the past Binchang mining area exploration drilling coal quality testing statistics analysis.The distribution of sulfur,ash content,volatile matter,calorific value and harmful trace elements of No.4 coal seam were discussed.According to the new coal resource potential evaluation of the proposed clean coal classification scheme grade 6,the cleanliness of Binchang mining area No.4 coal seam was drew primarily from the aspects of ash,sulfur,F,Cl,As and Pb.The low sulfur,low-medium ash,medium-high volatile,extra-high calorific value non-caking coals were the main coal types of No.4 coal seam,the weakly caking coal was a few.The cleanliness class of raw coal was Ⅲ which belonged to the better clean coal.The cleanliness class of float coal was Ⅱ which was good clean coal.The clean coal rank of No.4 coal seam in the whole mining area was mainly grade Ⅲ clean coal,the distribution area occupied 73.03％ of the mining area,only a small range of Ⅳ grade in the area of Hongjia Town-Jujia Town and the Middle East clean coal distribution area,accounting for an area of 26.97％.