Application and setting principles of rational width of water proof coal pillar
Wang Bing1, Sun Jiang2, Gao Yuan3
1. Zhaoguan Mine of Shandong Energy Xinwen Mining Group, Dezhou 253000; 2. Gucheng Mine of Shandong Energy Lingxi Mining Group, Jining 272000, China; 3.China University of Mining and Technology(Beijing), Beijing 100083, China
Based on old empty water burst in coal mine goaf, basic pinciples of waterproof coal pillar were determined combining geological and production conditions, as well as its internal stress distribution characteristics. Rational width of waterproof pillar was 60m through theoretical derivation method. The numerical calculating results showed that this rational width could effectively prevent old water burst, eliminate water hazards and guarantee safety production in coal mine.
