Practices on Face Width Shortening Coal Mining of Fully Mechanized Coal Mining Face

According to the coal resource shortages in Kailuan Mining Area and the status of more and more abnormal coal mining faces layout in the boundary cor ner seam and the geological condition complicated area, a trial mining with different face width shortening method was conducted in No.2087 fully mechanized coal mini ng face of Donghuantuo Mine and No.0091 fully mechanized coal mining face of Jingezhuang Mine. With the rational engineering organization, during the face width sho rtening terminal period, the steel mesh, wire and beam was applied to create the pilot conditions at the face width shortening ends and two face width shortening modes were applied to set the timber packs and other measures at the related spaces of the downward width shortening face end to reinforce the roof control at the end of the face width section and to solve the technical problems of the roof control at the face ends of the abnormal fully mechanized coal mining face. The practices showed that the fully mechanized coal mining face with the face width shortening mining, whatever the engineering organization or the mine pressure behaviors, the first removal an d then mining mode would be better than the first mining and then removal mode.The practices could provid the references to the selection of the face width shortening mining mode for the fully mechanized coal mining face.