Shock and Vibration / 2020 / Article / Tab 5

Research Article

A New Method for Predicting Coal and Gas Outbursts

Table 5

Gas desorption index K1 of drilling cuttings based on geological structure and precursor areas of outbursts.

AreaFailure type of the coal seamK1max indexGeological structureOutburst precursor

Return air roadway in the 121901 working faceIII, IV0.56Thinning of coal seam
Return air roadway in the 121901 working faceIII, IV0.83Thinning of coal seam
Return air roadway in the 121901 working faceIII, IV0.89Thinning of coal seam
Transportation roadway in the 121901 working faceIII, IV0.82Thinning of coal seam
Transportation roadway in the 121901 working faceIII, IV0.95Thinning of coal seam
Transportation roadway in the 121901 working faceIII, IV0.69Thinning of coal seam
Transportation roadway in the 121901 working faceIII, IV0.80Thinning of coal seam
Transportation roadway in the 121901 working faceIII, IV0.57Thickening of coal seam
Transportation roadway in the 121901 working faceIII, IV0.83Thinning of coal seam
Transportation roadway in the 121901 working faceIII, IV0.70Thinning of coal seam
Transportation roadway in the 121901 working faceIII, IV0.85Thinning of coal seam
Transportation roadway in the 121901 working faceIII, IV0.74Thinning of coal seam
connection roadway in the 121901 working faceIII, IV1.01Thinning of coal seam
connection roadway in the 121901 working faceIII, IV1.04Thinning of coal seam
South return air roadway at 1800 m levelIII, IV0.72Thinning of coal seamCoal burst
Transportation roadway in the 121901 working faceIII, IV0.78Thinning of coal seamEmission after pulling the drill pipe out
connection roadway in the 121901 working faceIII, IV0.88Thinning of coal seamEmission after pulling the drill pipe out
connection roadway in the 121901 working faceIII, IV0.88Thickening of coal seamEmission after pulling the drill pipe out

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