Calculation Analysis on Recovery Ratio of Fully Mechanized Top Coal Caving Mining Face

The calculation of the coal mining recovery ratio of the top coal caving mining face was simply based on the raw coal production divided by the mineable geological reserves.The obtained coal mining recovery ratio of the coal mining face usually would be too high and would lack scientificalness,accuracy and objectivity.During the calculation of the coal mining ratio for No.08 fully mechanized top coal caving mining face in Shendong Liuta Mine,a net coal production value method was applied to calculate the coal mining recovery ratio of the coal mining and that the real coal production value would be the raw coal production minus the rejects in the coal and the surface moisture.Then the daily drilling and exploration data of the top coal thickness was applied to calculate the coal geological reserves required for the coal mining face and the comparison between the two would be the accurate mining ratio of the fully mechanized top caving mining face.The calculation procedure and methods was proposed to be the basis for the mining recovery ratio of the fully mechanized top coal acing mining face in the near future.