新疆准南煤田阜康一带煤炭资源分布区地质特征

研究区大地构造位置位于乌鲁木齐山前凹陷(Ⅲ2)之准噶尔南缘凹陷(Ⅳ3)和大龙口凹陷(Ⅳ5)内．研究区内从古牛—新生代地层均有出露，其中下侏罗统八道湾组(J1b)和中侏罗统西山窑组(J2x)为研究区内主要含煤地层．下侏罗统八道湾组(J16)为一套河流-沼泽相沉积为主的含煤碎屑岩建造，中侏罗统西山窑组(J2x)为一套以浅湖．滨湖．湖缘三角洲-泥碳沼泽相沉积的含煤碎屑岩建造．八道湾组含煤层13～23层，可采煤层8～19层，煤的工业牌号以气煤和气肥煤为主．西山窑组含煤11层，可采10层，煤的工业牌号以长焰煤为主．研究区在含煤建造形成之后，又经历了燕山运动和喜山运动的改造，强烈的构造活动形成了研究区内自南而北的一系列褶皱和断裂．构造运动对研究区内的煤层造成了极大的破坏．

GEOLOGICAL CHARACTERISTICS OF THE COAL RESOURCE ZONE AT BUKANG, XINJIANG

The geotectonic position of study area lies in the southern margins of the Zhungeer depression and Dalongkou depression, which belong to the Urumchi piedmont depression. The study area exposes stratums from Paleozoic to Cenozoic. The mainly coal-bearing stratums are Jurassic Badaowan formation (J1b) and middle-Jurassic Xishanyao formation (J2x). The low-Jurassic Badaowan formation (J1b), a coal-bearing clastic rock formation , is a suite of river-swamp faces sediment. The middle Jurassic Xishanyao formation (J2x), a coal-bearing clastic rock formation, is a suite of neritic lake-shore lake-lake edge delta-turf swamp facies sediment. The coal bed of Badaowan formation is distributed at Wugonghe-Dahongshan. The bed includes 13-23 coal seams, the mineable position is 8-19 seams. The coal is mainly steam coal and steam-fat coal. The coal seam of Xishanyao formation is mainly distributed at Sangonghe. The coal-bearing seam is 11 seams and the mineable layer is 10. The main coal type is jet coal. The coal-bearing formation suffered deformation during the Yenshen movement and the Himalaya movement after formation. Strong tectonic activity has formed a series of folds and faults from the south to north in the study area. These faults and folds caused great destruction to coal seam in study area.