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中文摘要：
厚风积沙薄基岩浅埋煤层实现保水开采,关键是煤层开采后在上覆岩层中形成的导水裂隙带是否破坏了含水层底部隔水层的稳定性。在分析含、隔水层的分布特征以及基岩层的物理力学特性的基础上,结合采动岩层内部移动变形规律,推导了岩层层向拉伸变形的计算公式,给出了一种预计导水裂隙带高度的预测方法,并结合相似模拟实验确定了厚风积沙薄基岩浅埋煤层开采覆岩导水裂隙带发育高度,研究成果为保水开采提供了理论指导。
英文摘要：
To implement water-preserved-mining in shallow seam covered with thick windblown sands and thin bedrock,the key is that whether the the stability of water resisting layer at the bottom of the aquifer is destroyed by the water flowing fractured zone of the overlying strata after coal seam mining. Based on the analysis of the aquifer and aquifuge distribution and physical and mechanical characteristics of rock layer and combined with the movement and deformation inside mining induced strata,this paper deduces the calculation formula of the layer tensile deformation,and presents the method of predicting the height of water flowing fractured zone.Combination with the similarity simulation experiment confirms the height of water flowing fractured zone of the overlying strata of the shallow seam covered with thin bedrock and thick windblown sands. The research results provide the theoretical guidance for water-preserved-mining.
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