靖远煤田宝积山-红会矿区外围赋煤特征及勘查方向研究

靖远煤田宝积山、红会矿区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白土梁一马饮水复式向斜的展布方向和分布范围、F1h断层特征和煤系地层层序的研究．预测研究区有可采煤层存在．且煤层埋藏深度在1200～2000m。通过分析宝积山、红会两矿区赋煤地层及构造特征，认为研究区与两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，煤系地层薄，煤层层数少、厚度大，含煤性好，资源储量丰度大。根据已知矿区地质条件，结合以往地质工作程度的差别，提出宜采用不同的勘查方法分区分段开展地质找煤工作。

A Study on Coal Hosting Features and Prospecting Orientation in Peripheral Baojishan and Honghui Mine Areas, Jingyuan Coalfield

The coal-bearing strata in the Baojishan and Honghui mine areas, Jingyuan coalfield belong to middle Jurassic Yaojie Formation, and contain abundant coal resources. Because of many years mining, coal resources will be exhausted, thus the issue of follow-up resource is the top priority. Through the reviewing of the main coal-controlling structure Baituliang-Mayinshui synclinorium extending orientation and range in the area, fault F~h characteristics and coal measures strata sequence, the existing of mineable coal seams has been predicted, their buried depth will be 1200m to 2000m. Through coal-bearing strata and structural analyses in the two mine areas have considered that the two mine areas should be in an identical intermontane coal accumulation depression. Coal- forming environments belong to fluvial, lacustrine and swamp facies, the lithofacies cycle led off with fluvial facies and end up with pan-lacustrine facies. Coal seams are located in middle upper part of the cycle, with thin coal measures strata, few coal seams but large thicknesses and good coal-bearing property, large resource and reserve abundances. According to known geological conditions, combined with differences in previous degree of geological works, using different prospecting methods to carry out coal looking works by districts and sectors.