Joint development method - the development plan for the blind shaft in the lower part of the upper Pingyi

When the upper part of the ore body is above the ground level and the lower part is located below the ground level, it is convenient for development and more economical and reasonable. The upper part of the ore body can be developed with a flat shaft, and the lower part can be developed with a blind shaft, as shown in Figure 7-13. Figure 7-14 shows.

In Figure 7-13, when the position of the blind shaft is considered in the vicinity of the ore body (see the 321m plan) (the influencing factors are the same as the lower shaft scheme in the single development scheme), the middle section of the stone gate should be made shorter. The ore (or waste rock) can be lifted to the middle section of 321m via the blind shaft. The mine car is transported out of the cornice by the motor car after being grouped in the yard.

This type of program is characterized by the need to increase the number of underground yards and rolling chambers in the 321m flat. If the upper part of the ore body is not far from the surface, and there is no waste disposal site in Pingkoukou (or to occupy the farmland area in order to compress the waste rock field), a joint development plan for the horizontal shaft through the surface can be used (Fig. 7-14). When the hoist is installed on the surface, the underground waste rock is lifted to the wellhead, and then discharged to the wellhead waste rock yard, and the middle ore is lifted to the level of the flat by the shaft and transported to the pass by the flat. In the specific choice of the program must be considered in many aspects, in order to finalize the most reasonable solution.