首批煤炭国家规划矿区煤田地质特征综述

Summary of Coal Geological Characteristics of the First Group of State Programmed Mining Areas

首批煤炭国家规划矿区位于华北赋煤区鄂尔多斯盆地内,主要可采煤层多达10层,分别位于太原组、山西组和延安组。煤质以焦煤和无烟煤为主,其中太原组、山西组煤层具有横向变化小、垂向呈周期性变化的规律;而延安组横向变化较大,聚煤中心具有明显的由南向北迁移现象。受左旋剪切挤压作用,形成了一系列大型北北东向复式褶皱与断层,根据构造复杂程度,确认9个石炭—二叠纪煤田矿区和5个侏罗纪煤田矿区属简单类型。分析首批煤炭国家规划矿区内的控煤构造、矿床水文地质类型、充水因素以及煤层顶底板岩性特征,认为绝大部分矿区煤层稳定、构造和开采技术条件简单。

The first group of state programmed mining areas is located in both Ordos Basin and Shanxi Basin in North China coal zone. Up to 10 layers of main minable coal seams are belonged to the Taiyuan, Shanxi and Yanan formations respectively. Most of coals are eoking coal and anthracite ranked. The Taiyuan and Shanxi formations have minor transversal changes, and cyclic variations vertically; while the Yanan Formation has larger transversal changes, coal-accumulating center migrated from south to north obviously. Under the sinistral shearing and compressing, a series of mega NNE composite folds and faults were formed, based on structural complexity, confirmed that 9 Permo-Carboniferous and 5 Jurassic coalfield mining areas are simple typed. After analyzed the coal controlling structures, mining hydrogeological types, water filling factors and coal roof and floor lithological characteristics, considered that the vast majority of mining areas have stable coal seams, simple structures and mining technological conditions.