Research Support Technology Of Stagger Arrangement Roadway By Non-chain-pillar Entry Protection On Think Coal Seam

More and more coal mines turns to deep seam mine with the continued super-exploitation of coal. The danger of rockburst becomes more serious. Research support technology of stagger arrangement roadway by non-chain-pillar entry protection on think coal seam.Carrying out this research to prevent the occurrence of rockburst, reduce the loss of coal mining, ensure mine safety.Coal seam thickness of Huafeng is6.2m, the inclination is32°.The1411working face burys one kilometer, covers500m thick conglomerate,the danger of rockburst very serious. Thesis according to the law of motion of overlying strata by using real-time on-line monitoring rockburst system to monitor the lateral coal of1411roadway,and combine with the pressure monitoring of roadway, get the following results:(1) got the overlying strata structure model and quantitatively calculates loads of strata moving, combine with the affect of strata moving for roadway support, identified the supporting force of roadway;(2) Identified the calculation methods of lateral roadway supporting, so designs different supporting force to ensure the stable of roadway;(3) got the internal stress affect of repealing coal pillar and other measures, repealed coal pillar can effectively reduce the stress in the lateral entities coal and greatly reduce the impact of risk, so the danger of rockburst is reduced. The danger of rockburst can be greatly reduced by repealed coal pillar of1411roadway. The research has the use for reference to anyother similar deeping mining.