青海木里聚乎更矿区木里组煤层发育特征及煤层对比

Development Features and Correlation of Muri Formation Coal Seams in Juhugeng Mine Area, Muri Coalfield, Qinghai

木里煤田聚乎更矿区的主要含煤地层为中侏罗统木里组。根据岩性特征、岩性组合特征及其含煤性,将木里组分为上、下两段。木里组上段地层为含煤层段,含2层煤,分别命名为下1煤和下2煤。其中下1煤平均厚度11.55m,下2煤平均厚度11.43 m,全区稳定可采。主要采用标志层法、层间距法、岩性组合法、煤岩煤质法、测井曲线法等对煤层进行对比分析,为正确划分含煤地层,准确估算煤炭资源量提供依据。

The main coal-bearing strata in the Juhugeng mine area, Muri coalfield belong to middle Jurassic Muri Formation. Based on lithology, lithologic association features and coal-bearing property, the formation can be partitioned into upper and lower two members.The upper member contains 2 coal seams namely coal L1 and L2. Average coal thickness of L1 is11.55 m, L2 is 11.43; all stably mineable in whole area. Mainly through marker horizon, interlayer spacing, lithologic association, lithotype, coal quality and logging trace methods carried out coal seams correlation and analysis, thus provided basis to correctly partition coal-bearing strata and accurately estimate coal resources.