Application of Full-mechanized Caving Mining Meduim-thick Coal-seam in Shendong Mining Area

Single-full mining method was applied in Dongsheng coal-field of Erdos.Mining height increased year by year and current mining height has reached to 7.2m.Mining height was limited by coal and roof fall at coal-wall,and the coal-seam thickness variation also limited full application of mining equipments for large mining-height.Therefore,Shendong Corporation firstly applied full-mechanized caving mining in thickness variation area of eastern panel of Liuta Colliery.This provided an effective approach for mining extreme thick coal-seam.