侏罗系煤层顶板涌水量动态变化及其形成机制分析

以鄂尔多斯盆地北部的泊江海子煤矿113106工作面为研究点,建立了顶板砂岩含水层的水文地质概念模型和模拟模型,利用井下试验数据对模型进行识别和验证,获得了研究区砂岩含水层水文参数,结合工作面推进过程,按块段预测涌水量。结果发现:由切眼向工作面收作线方向,其涌水量异常增大,综合褶皱、古地貌、沉积相变分析其形成机制,为泊江海子矿下一步一盘区顶板砂岩水科学疏放与防治提供了重要依据。

Dynamic change and formation mechanism analysis of water inflow in the roof of Jurassic Coal Seam

The hydrogeological conceptual model and simulation model of the roof sandstone aquifer of the 113106 working face of Bojianghaizi Mine in the northern Ordos Basin were established. The model was identified and verified by the downhole test data, and sandstone aquifer hydrological parameters were obtained using the model. Combined with the working surface advancement process, the amount of water inflow was predicted using the block segment method. The results showed that the amount of water inflow increased greatly from the cut-eye to the working face. By combining with the formation mechanism of fold, paleogeomorphology and sedimentary phase transition analysis, it provides an important basis for the scientific drainage and prevention of roof sandstone in the next section of the Bojianghaizi mine.