“π”型钢放顶煤回采工艺探析

Study and Analysis on Technics "π" Type Steel Girder

简要介绍了国投新集二矿1306工作面通过采用"π"型钢放顶煤采煤工艺,科学合理地应用矿压理论和放矿原理,提高了工作面的回采率,取得了良好的效益,并对"π"型钢放顶煤回采工艺进行了探析。

This context introduce Mining technics of caving coal face 1306 of State - own Xinjin Energy Co Ltd, and it apply ground pressure and discharge coal theory to Mining technics scientifically and reasonably, increase Cutting Coal Rate and benefit from ＂π＂ Type Steel Girder completely , have done the discussion in the ＂π＂ Type Steel Girder.