The end-hole bottom yard is shown in Figure 7-27a for cage lifting. It is characterized in that the storage line and the yard of the single-side inlet, exit, air and heavy vehicles of the wellbore are all located on the side of the wellbore. After the empty cage is pulled out from the cage, the heavy truck is further pushed. This kind of yard has a small passing capacity and is mainly used for small mines or auxiliary shafts.
The reentry type bottom hole yard is shown in Figure 7-27b. It is characterized by laying lines on both sides of a wellbore or unloading equipment (such as a dumper). One side enters the heavy truck and the other side goes empty. The empty car returns through the parallel line that is additionally laid or from the original line (changing the head and tail direction of the mine car). The advantages of the reentry type bottom hole yard are mainly: the production capacity of the bottom hole yard is improved; since the foldback line is shorter than the loop line and the number of corners is small, the vehicle staying time in the bottom yard is significantly reduced, and the vehicle turnover is accelerated; The amount is saved. Since most of the transportation lanes are integrated with the mine transportation lanes or main stones, the corners and intersections are greatly reduced, simplifying the line structure; transportation is convenient, reliable, and the number of operators is reduced, creating conditions for transportation automation. The trains are mainly in straight sections. Running, not only high speed, but also safe to run.
The bottom hole yard is shown in Figure 7-27c. It is the same as the foldback type. It is also a side-loading truck and the other side is empty, but it is characterized by the empty car coming out of the wellbore or unloading equipment passing through the storage line and the bypass head (the heading of the mine car is unchanged) return.
Figure 7-28b shows the bottom hole yard of a double wellbore. The main well is a bucket well and the auxiliary shaft is a tank well. The running lines of the main and auxiliary wells are all ring-shaped, forming a double-ring bottom hole yard.
In order to reduce the amount of wellbore engineering and simplify management, it is also possible to replace the double wellbore with a mixed well under the conditions of production capacity, that is, to raise the mine with a bucket, to raise the waste rock with a cage and to transport personnel and materials and equipment. The line layout at this time is the same as when using a dual wellbore. Figure 7-28c shows the layout of the bottom of the mixed wells in the double-cage single-cage cage. The bucket is used to lift the return-type yard, and the cage is lifted to the end of the yard. Figure 7-28a is also the layout of the bottom of the hybrid well, the bucket line is the ring yard, the cage line is the fold-back yard, and the passing capacity is larger than the c type.
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