Seismic Reduction Mechanism and Engineering Application of Paste Backfilling Mining in Deep Rock Burst Mines

In the process of coal resources development, a large number strip pillars have been left behind in mines central–eastern China. With increase mining depth year by year, rock burst threat is becoming more and prominent due to influence buried depth, geological structure, gob other factors. Backfilling main means recover residual pillar. order investigate effect backfilling on prevention control burst, taking paste workface 1# Gucheng mine as engineering background, comprehensive research method theoretical analysis, numerical simulation field monitoring was used study evolution stress overburden spatial structure under backfilled ratio. The results showed that controls movement deformation reducing activity range roof strata. fracture development height decreases with ratio, but there boundary influenced deflection before defective distance contact. concentration coefficient front abutment pressure, vertical displacement plastic zone overlying strata decreased obviously, which indicates filling can effectively surrounding data pressure about 90 m maximum two entries did not exceed 7 MPa. average daily frequency microseism 1.34, total energy 1.80 + 103 J, 69% 90%, respectively, compared caving working face similar conditions. above reduce level dynamic load strength achieve burst.