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The mining bottom structure includes the mine roadway, the mining roadway, the transfer roadway, the secondary crushing roadway and the auxiliary roadway (the roadway for the entry, ventilation and transportation materials), which are arranged on different horizontal layers.
The structure of the bottom of the stope depends mainly on the type (or shape) of the mine roadway, the mining equipment used, the thickness and inclination of the ore body, and the presence or absence of secondary crushing horizontal layers. It is generally divided into the following three categories:
(1) Funnel-type bottom structure, (2) Dong-structure bottom structure, (3) Flat-bottom bottom structure.
Since the scraper is used for stope transport and deep hole blasting is used for bottoming, the development trend of the bottom structure is to simplify the structure (from multi-level to horizontal, and multiple lanes to one), and expand The section of the mine roadway uses artificial concrete to construct an artificial bottom column.
The selection of the section shape, size, and spacing of various roadways and diverticulum in the bottom structure of the stope is related to the method of moving yards, mainly due to the influence of the size of the mining equipment, and then the bottom. The stability of the structure, so the content of the bottom structure parameters combined with the approach of the mining method.
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