MITIGATION SYSTEM OF COAL BUMPING IN MINING EXTREMELY THICK COAL SEAM

摘要

Based on study of coal bumping in extremely thick coal seam of Qianqiu Coal Mine, the characters and influence factors of coal bumping are recognized. And also it can be found outthat the coal bumping of extremely thick coal seam of Qianqiu Coal Mine is high stress type. So a suitable coal bumping mitigation system in mining extremely thick coal seam is built. It's proved to be effective by 21181 working face's one year production practice: during this one year time the total time of coal bumping happened is only 12.5percent of the last year and the total damaged road length of coal bumping is only 6 percent of the last year. So the coal bumping mitigation system is successful in mining the extremely thick coal seam in Qianqiu Coal Mine and it can be a good example for mitigation coal bumping in mining extremely thick coal seam with coal bumping tendency smoothly with fully mechanized sub-level caving mining technology.