废弃矿井含水介质场特征和水流运动特征分析
Analysis on Water Content Medium Field Features and Water Flow Motion Features in Abandoned Mine
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摘要: 分析了采矿扰动下形成的特殊含水空隙类型,将废弃矿井中的受扰动含水介质概化为井巷管道型集水疏水介质、似层状分布的采掘垮落岩体强渗透网络裂隙介质、非均匀不规则分布的扰动裂隙介质和离散分布的区域控水构造断裂介质4种类型。通过不同含水介质的水动力学特征描述,指出巷道系统地下水流为紊流,其他介质中基本为渗流,并提出了废弃矿井地下水回升时水流由巷道向围岩渗透的径流过程。最后,根据水均衡理论和补排关系,提出了不同介质相互间交换水量的计算方法,并进行了耦合关系分析。Abstract: The paper analyzed the special water bearing porous formed under the mining interferences.The water bearing medium affected by the mining in the aba ndoned mine could be typified in to four type medium, such as the mine shaft and roadway pipeline collected water drainage medium, the high penetrated network crack s medium from the layer distributed mining and excavation caved rocks, inhomogeneous and irregular distributed turbulent crack medium and the breaking medium from the discrete distributed regional water control structure.With the description of the water dynamics features of different water bearing medium, the paper pointed out tha t the underground water flow in the mine roadway system would be a turbulent flow and other mediums would be vadose. The paper provided that when the underground water in the abandoned mine rose, water would flow along the mine road and penetrate to the surrounding rocks. Finally according to the water balance theory and the fi lling and discharging relationship, a calculation method of the different medium mutual changing water quantity was provided and the analysis on the coupling relations hip was conducted.
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