PREFERRED SEEPAGE CHANNELS AND SOURCE OF WATER INRUSH IN SEABED GOLD MINE AT SANSHANDAO

This paper is based on the detailed investigation of roadway water flowing fractures for the water seepage. It analyzes the connectivity advantage of orientation and mine water seepage and surface water bodies of two gold mines at Sanshadao. It summarizes the distribution of crack occurrence, and gushing water sample temperature, salinity and dynamic monitoring of the results of hydrogen and oxygen isotope. The study shows that the water-seepage dominant orientation in the district of Xishan mine is parallel to the maximum horizontal principal stress. The optimal direction of Xinli mine water seepage is nearly perpendicular to the maximum horizontal principal stress. The Xishan mine has stable recharge of seawater, rock saline, and Quaternary fresh water. In the Xinli mine, the proportions of saline and fresh water in inrushing water in mine pits are diminishing gradually, as the seawater increases. The role of neotectonic fractures in controlling the dominant orientations of mine water seepage is stronger than that of fractures developed by excavation. The neotectonic fractures make the Xishan mine have well connectivity with surface waters and control the recharge process of the seawater. There is weaker connectedness between pits and surface waters in the Xinli mine which attributes to the mining-induced fractures.