煤岩体既有大量的微孔隙又有割理的存在，可以简化为双重介质模型。
Coal rock body is simplified as a double-medium model, including a plenty of micropores and cleats.
这种模型比双重介质模型更接近实际，而且能更好地利用微孔隙结构的实验数据。
This kind of model is more close to the realistic situation, and is easy to use as in the case of a double porosity medium model.
当前裂隙岩体地下水渗流数值模型主要有三种：等效连续介质模型、离散裂隙网络模型和裂隙-孔隙双重介质模型。
Mathematical models of seepage in fractured rock can be classified into: continuum seepage model, discrete fracture network seepage model and continuum-discrete coupling seepage model.
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