What is staged mining and district mining? Briefly describe the division method of staged mining and the applicable conditions of staged mining?

What is staged mining and district mining? Briefly describe the division method of staged mining and the applicable conditions of staged mining?

A: Staged mining refers to the division of several small temporary mining boundaries within a reasonable realm. According to the time of each stage and the mining sequence, the small temporary boundary is gradually exploited to the big realm.

Zoning mining refers to the division of several small mining areas on the plane under the same mining depth within a certain reasonable mining boundary. According to the mining conditions and production needs of each area, the mining is divided in a certain order to improve open pit mining. The economic effect.

The method of dividing the realm of staged mining: Generally, according to the principle of reasonable economic stripping ratio, the maximum realm or final realm is first determined, and then the small realm of sub-segment mining is further divided within the maximum mining realm. There are two types of division methods for small-scale boundary mining. When the thickness of the ore body is large, the inclination is deep, the reserves are abundant, the mining period is long, and the small boundary is divided along the tendency. When the ore body is long, the reserves are abundant, the mining period is long, and the direction is long. Divide small realms.

Applicable conditions: 1. The ore body is long or deep, the reserves are abundant, and the mining decline rate is slow, the mining period exceeds the economic reasonable service period; 2. The thickness of the deposit covered rock layer is different, the surface has independent peaks, and the base construction has large amount of stripping; The surface of the deposit has rivers, important buildings and structures, and villages. 4. The thickness of the deposit varies greatly. The rich and poor mines are distributed in different sections, or the rich ore processing and sorting indicators are different. 5. A section of the deposit has been The survey is clear. Generally, the stage of the staged mining is determined within the scope of the obtained industrial reserves. With the mining and supplementary exploration, the scope and depth of the mining area are expanded, and the mineral resources are increased, causing the boundary to expand and form a natural staged mining.

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