窑街煤田外围赋煤特征及找煤方向

Coal-Bearing Features and Prospecting Orientation in Peripheral Yaojie Coalfield

窑街煤田含煤地层为中侏罗统窑街组,煤炭资源较丰富。由于多年开采,资源面临枯竭,解决资源接续问题已成当务之急。通过对区内主要控煤构造F19断层的特征和煤系地层层序的研究,推断F19断层可能是煤系沉积过程形成的同沉积断裂,对煤层赋存起控制作用,预测研究区F19断裂带以东有可采煤层存在。通过研究窑街矿区沉积特征、聚煤规律和构造控煤因素,认为研究区与窑街矿区应属同一山间聚煤坳陷,成煤环境为河湖沼泽相,岩相旋回以河流相开始,泛湖相结束,煤层位于旋回中上部,其厚度大,含煤性好,资源潜力大。根据已知矿区地质条件,结合以往地质工作,提出在窑街矿区东部的散马池—阳洼一带开展找煤工作。

The coal-bearing strata of Yaojie coalfield belong to middle Jurassic Yaojie formation, which contains abundant coal resources. Due to years of exploration, the coal resources is about to be exhausted, the issue of follow-up resource is a top priority. Through reviewing the charac teristics of the main coal-controlling structure （F19 fault） and coal measures stratigraphic se- quence, the authors inferred that the F19 fault is a syndepositional fault that controls the coal bearing, and predicted that the mineable coal seams lie in the east part of the F19 fault. Based on analysis of sedimentary characteristics, coal-accumulating the Yaojie coalfield, it is considered that the study area an patterns and coal-controlling factors of d Yaojie coalfield should be in an identi cal intermontane coal accumulation depression. The coal-forming environment belongs to fluvial, lacustrine and swamp facies, the lithofacies cycle led off with fluvial facies and end up with pan lacustrine facies. Located in middle upper part of the cycle, the coal seams have good resource potential with large thicknesses and good coal-bearing property. According to known geological con ditions and previous geological works, this paper proposed that the east part of the coalfield like Shanmachi and Yangwa are favorable regions of coal prospecting.