Research Article
Roadway Support in Deep “Three-Soft” Coal Seam: A Case Study in Yili Mining Area, China
Table 3
Parameters of the structural elements.
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Emod is Young’s modulus, Gr_coh is grout cohesive strength (force) per unit length, Gr_fric is grout friction angle (degrees), Gr_k is grout stiffness per unit length, Gr_per is grout exposed perimeter, Xcarea is cross-sectional area, and Ytension is tensile yield strength (force). |