Advances in Civil Engineering / 2021 / Article / Tab 3

Research Article

Study on the Retention of Large Mining Height and Small Coal Pillar under Thick and Hard Roof of Bayangaole Coal

Table 3

Calculation results of principal stress at each measuring point of Bayangaol mine.

PointDepth (m)Maximum principal stress (σmax)Intermediate principal stress (σmid)Minimum principal stress (σmin)
Numerical (MPa)Direction (°)Dip angle (°)Numerical (MPa)Direction (°)Dip angle (°)Numerical (MPa)Direction (°)Dip angle (°)

162022.95112.5817.7619.8419.1110.6815.98259.5269.08
262029.45102.65−13.418.05−10.15−10.3415.53116.32−72.9
363624.87269.70−2.8016.410.31−12.1115.71166.8977.56

Article of the Year Award: Outstanding research contributions of 2020, as selected by our Chief Editors. Read the winning articles.