Integrated Technology of Backfill Mining and Raw Coal Separation in Underground Mine

In order to solve the problems of mining subsidence and repeated lifting of gangue, taking Tangshan Coal Mine as a study object, the paper adopted the method of theoretic analysis and site measurement to study the backillining mining and raw coal separation integrated system.The system layout and process flow wer e introduced.The economic, social and environmental benefits were analyzed.The results showed that gangue separated from raw coal in underground mine could direc tly use for bakilling goaf, simplify the traditional solid backfill process and aviod gangue lifting, gangue separation from raw coal in ground surface and feeding well co nstruction. The integrated technology could reduce the expense of backill coal mining, decrease the surface subsidence, avoid the repeated lifting of gangue and waste pollution to the environment.