Choosing a reasonable bottom hole yard form and line structure is the primary problem in the design of the bottom hole yard. There are many factors that influence the choice of bottom yards, such as production capacity, type of lifting container, transportation equipment and shunting methods, number of wellbores, various main diverticulum and its layout requirements, ground production system requirements, rock stability, and wellbore and transportation lanes. The relative position and so on, therefore, must be fully considered. But in metal mining, in general, the main consideration the previous four.
The choice of large production capacity is in the form of large capacity. The annual output of 300,000 tons or more can be used in the ring-shaped or folding-back yards, and the 100-300,000-ton can be used in the folding-type parking lot. Below 100,000 tons, the end-type parking lot can be used.
When using a bucket lift, the fixed mine car is unloaded with a dumper. When the output is small, the electric car can be used to push the top ore train into the dumper for unloading, and immediately after unloading, that is, the folding return yard returned by the original entry line. When the output is large and transported by multiple electric vehicles, the cart can be set in front of the dumper or the self-slip can be used. At this time, a folding return yard with a separate return line can be used.
When a caged well is used and doubles as a primary or secondary lift, a circular yard is generally available. When the output is small, a folding return yard can also be used. When the auxiliary shaft is lifted by the cage, the vehicle is turned over, and the form of the yard is determined according to the number of cages and the amount of lifting. If it is a single tank and the lifting amount is not large, the end-hole bottom yard can be used.
When using a bucket-cage mixing well or two wellbores (one main and one pair), a double wellbore bottomhole yard is used. In the line layout, the two sets of main and auxiliary lifting lines must be combined with each other, and the line sharing problem should be considered in the arrangement of the shunting lines. For example, when the main lift 箕 箕 well yard is a ring, the auxiliary hoist cage yard can be connected to the main well line under the condition of little increase, forming a double-ring bottom hole yard.
In short, when selecting the form of the bottom hole yard, under the condition of meeting the production capacity requirements, the structure is simple, the engineering quantity is saved, the management is convenient, the production operation is safe and reliable, and the construction and maintenance are easy. The passing capacity of the yard is greater than 30% to 50% of the designed production capacity.
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