Table 1 Variables of Baoqing open-pit coal mine.

From: Optimization study on transverse mining zoning during the capacity expansion stage of nearly horizontal open-pit coal mines

Variable

Value Retrieval

Ap

7,000,000 t

hm

12.22 m

γ

1.22 t/m³

η

0.9

H

62 m

β

22°

a

0.5

α

8°

θ

10°

m

50 m

C1

5.42 yuan/m³

C2

0.00314 yuan/m³·m

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