Abstract:

The roof and floor rocks of submarine orebody in Sanshandao are strength,hardness and good stability,but the intensity of rocks near fracture decrease,its stability low,affected by fracture.Consolidation should be used before construction to avoid harm.Through research and analysis seabed subsidence theory,it shows that it is necessary to reasonable roof-contacted filling for gob.Through implementation,we obtain good filling.In addition,using microseismic monitoring technology to monitor ground deformation,which results in the error range,and it has no effect on surrounding buildings.

Key words: Roof-contacted filling, Submarine settlement, Microseismic monitoring, Sanshandao submarine gold mine, Shandong Province