Bulking Factor of Rock For Underground Opening | PDF ...
Coefficients for Average Caving Height and Predicted Bulking Factors for Chinese Coal Mines* Coefficients Predicted Bulking Factor Strata Lithology Compressive Strength (MPa) c 1 c 2 h = 2.5 m h = 4.0 m h = 5.5 m Strong and hard >40 2.1 16 21.3 24.4 27.6 Medium strong 20-40 4.7 19 30.8 37.8 44.9 Soft and weak <20 6.2 32 47.5 56.8 66.1 *Yavuz, H.
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