Table 5 Main variables of the financial subsystem.

From: Decision-making model for production and operation of underground gold mines considering low-carbon condition

Symbols

Description

Unit

Type

\({P_a}\)

Accumulated profit

104 RMB

Level

R

Sales revenue

104 RMB/year

Rate

C

Total costs

104 RMB/year

Rate

K

Fixed costs

104 RMB/year

Constant

\({C_p}\)

Operation costs

104 RMB/year

Auxiliary

\({P_g}\)

Gold price

RMB/g

Auxiliary

\({S_t}\)

Business tax and associate charges

104 RMB

Auxiliary

\({C_o}\)

Overheads

RMB/t

Constant

\({C_s}\)

Sales expenses

RMB/t

Constant

\({C_f}\)

Tonne cost of ore

RMB/t

Auxiliary

\({C_g}\)

Gram of gold cost

RMB/g

Auxiliary

\({C_{{m_i}}}\)

Unit mining cost i

RMB/t

Auxiliary

\({C_h}\)

Unit ore processing cost

RMB/t

Auxiliary

\({g_t}\)

Tailing grade

g/t

Constant

\({C_d}\)

Tailing disposal cost

104 RMB/year

Auxiliary

\({C_d}^{o}\)

Unit tailing disposal cost

RMB/t

Constant

\({C_u}\)

Comprehensive utilization cost of tailings

104 RMB/year

Auxiliary

\({C_u}^{o}\)

Unit comprehensive utilization cost of tailings

RMB/t

Constant

\({P_u}\)

Comprehensive utilization profit of tailings

104 RMB/year

Auxiliary

\({P_u}^{o}\)

Unit comprehensive utilization profit of tailings

RMB/t

Constant