浅埋薄基岩煤层上覆顶板突水机理研究

Study on water inrush mechanism of overlying roof in shallow-buried thin bedrock coal seam

本文对浅埋薄基岩煤层上覆顶板在回采动压影响下的稳定性及隔水性进行了相关研究。通过力学模型得出了顶板突水机理及发生条件,基于相似模拟实验对覆岩导水裂隙带发育及突水过程进行了分析,得出土采比、关键层及隔水土层厚度为主要影响因素,并结合现场生产实测对研究结果进行了验证。

In this paper, the stability and water isolation of overlying roof under the influence of dynamic pressure are studied. The mechanism and occurrence conditions of roof water inrush are obtained by mechanical model, based on the similarity simulation experiment, the paper analyses the development and water bursting process of the overlying rock-bearing water fissure belt, and obtains the main influencing factors of the soil-mining ratio, the key layer and the thickness of the water-retaining layer, and verifies the research results with the field production measurement.