GB/T 29723.5-2019Grade and limit of major process energy consumption for coal mine—Part 5: Main elevating system (English PDF)

3.1 Mine hoist

The electromechanical equipment for lifting and releasing personnel and materials in the mine, which drives the hoisting container connected with steel wire rope through the rotation of drum, with a drum diameter of 2 m and above.

5.1 Energy use boundary

The switch cabinet, which controls the start, stop and operation of the motor of the mine hoist or mine winder, is used as the starting point of the system's electric energy measurement. The exit of the mine hoist or mine winder is used as the terminal of the main elevating system. Include the energy consumption of equipment such as mine hoist or mine winder traction motor, electric control equipment, safety protection device, and signal system.

5.2 Statistical period

The process energy consumption of main elevating system is based on statistical data. The statistical period is one year.

5.3 Parameters and ranges

5.3.1 Power consumption (W)

The power consumption of the main elevating system during the statistical period. USE a watt-hour meter for measurement. The watt-hour meter shall be installed on the switch cabinet, which controls the operation of the mine hoist or mine winder.

5.3.2 Elevating mass (Q)

The cumulative mass of personnel or materials lifted by the main elevating system during the statistical period.

5.3.3 Elevating vertical height (H)

The vertical height for the hoisting container from the downhole material-loading point or man-carrying place to the up-hole material-unloading point or man-releasing place.

5.3.4 Inclined shaft lifting angle (alpha)

The angle BETWEEN the connecting line of the hoisting container from the downhole material-loading point or man-carrying place to the up-hole material-unloading point or man-releasing place AND the horizontal plane.

5.3.5 Mass of steel wire rope (m0)

The product OF the operating length of the hoisting container from the downhole material-loading point or man-carrying place to the up-hole material-unloading point or man-releasing place AND the mass of the steel wire rope per unit length.

5.3.6 Average mass of personnel or materials elevated at one time (m)

The net mass of personnel or materials for each lift. If multiple hoisting containers are lifted at a time, it is the sum of the loading capacity of each hoisting container.

5.4 Calculation methods

5.4.1 Calculation of process energy consumption of main elevating system of vertical shaft

The process energy consumption of main elevating system of vertical shaft is calculated according to formula (1):

Where:

Et - The process energy consumption of main elevating system, in kilowatt-hours per ton and hundred meters [kW · h/(t · hm)];

W - The power consumption of the main elevating system, in kilowatt-hours (kW · h);

Q - The cumulative mass of personnel or materials lifted by the main elevating system, in tons (t);

H - The vertical height of mine hoisting, in meters (m);

K - The conversion factor of vertical shaft elevating height. Refer to Appendix A, Table A.1.

5.4.2 Calculation of process energy consumption of main elevating system of inclined shaft

The process energy consumption of main elevating system of inclined shaft is calculated according to formula (2): […]