煤介质孔隙网络特性研究

Research on Pore Network Characteristics of Coal

煤的孔隙网络特性对煤层注水效果有极大影响。通过实验对煤介质的网络特性进行研究,并借助高压脉动水锤装置对煤介质进行水力锤击以改善其孔隙特性。实验表明,煤介质具有网络属性;煤介质内的孔隙通道表现为一定的随机性;高压脉动水锤装置对透气性差的煤介质的孔隙-裂隙连通性具有很好的疏通特性,能更好地将无效孔隙转化为有效孔隙,极大地改善静压注水效果。

The pore network characteristics of coal has great effect on seam water injection. The network characteristics of coal were studied through the experiment, and with the help of pulse water hammer device, pore characteristics of coal is improved. The experimental results show that coal with network attributes; Pore channel of coal in the medium performance for certain randomness; High pressure pulse water hammer can dredge coal medium pore-fracture connectivity, and can make void pore translate into effective porosity, result shows it's better than normal water injection.