Roadway Support in Deep “Three-Soft” Coal Seam: A Case Study in Yili Mining Area, China

Table 1

Results of geostress measurement.

Principle stress	Measurement result (MPa)	Dip angle (°)	Dip direction (°)
σ1	38.83	3.7	96.69
σ2	24.85	7.2	186.2
σ3	25.33	81.9	303.22