Practices on High Efficient Mining of Fully Mechanized Coal Mining Face in Seam with Partings

In order to improve the coal mining efficiency of the fully mechanized coal mining face in seam with partings, a coal cutting method suitable for the variat ion of the partings was applied According to the different parting parameters, a rational operation method was selected and a high efficient mining of the fully mechaniz ed coal mining face in seam with partings was realized.The practices showed that with the roof pressurized and the floor heave, the cutting drum of the coal shearer Co uld directly cut the top and bottom partings of the seam.As for the parting in the middle of the seam, when Protodyakonov coefficient of the parting was fs4.5 and the thi ckness of the parting was 0.2 m, the cutting drum of the coal shearer could be applied to cut the partings.When the thickness of the parting was 0.20.5 m, the partings C ould be handled with the loose blasting with a single raw layout of boreholes.When the thickness of the parting was 0.5~ 0.7 m, a loose blasting with double raw layout of boreholes could be applied to handle the partings.One vibration blasting could meet a coal cutting cycles and thus a optimized matching of the parting handling and C oal cutting could be realized.