Advances in Civil Engineering / 2019 / Article / Tab 3

Research Article

Research on Failure Mechanism and Strengthening of Broken Roadway Affected by Upper Coal Pillar

Table 3

Analysis of principal stress difference on the rock surrounding the roof during failure.

Influence of boundary pillarInfluence of the 051604 working faceInfluence of the 051606 working face

Influence value of each stage (MPa)4.45.68
Total impact value (MPa)4.41018
Influence degreeStrongStrongerExtremely strong

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