Characteristics and experimental study of water conduction caused by fault activation due to mining
Abstract：Water conduction caused by fault activation, as an important form of water inrush in coal mining, has strong and hidden mining risks. According to hydrodynamic theory of frac- tured media, the necessary condition for water conduction by fault activation should be stron- ger water pressure than normal stress in the original water conduction zone around fault. Un- balanced water pressure and ground stress caused by mining are the incentives for water con- duction by fault activation. The results show that seepage comes out from the fracture when water pressure is more than the confining stress in the lower permeability rock. Field tests a- bout water injection show that F6 was activated to lead water conduction when water pressure was up to 3.5 MPa in the Ge-ting coal mine, while the ground stress of numerical simulation was 2 to 4 MPa. The results of the theoretical analysis, experimental test and field test were consistent.
Keywords：water conduction caused by fault activationteststress unbalancenecessary con-dition
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 415-419 )