Study on influence of gangue filling and interval roadway excavation to surface movement and deformation

In order to solve problem of coal mining under buildings and gangue disposal the technology of interval roadway excavation and gangue rilling was studied.Based on limit span of rock beam and the ultimate bearing capacity of pillar analysis.dimensions of roadway mining pillarand establishing pillar were analyzed; at the same time in order to control infuence of coal mining on the ground movement and deformation ground displacement and deformation of various schemes were compared and analyzed by using probability integral method. The scheme of mining 5m and staying 5 m was determined and the field industrial test was carried out.Through the nalysis of surface subsidence along the strike and tendency of coal seam by layout of monitoring points results showed that influence of designed gangue flling and roadway mining plan on earth surface was very slight effectively control and surface movement and deformation in the buildings was in the range of".