The inclined well development is suitable for gently inclined deposits, especially for the development of layered deposits with inclination angle of 20°~40°. For the steeply inclined flank deposits, the flank inclined wells can be used for development, and the steeply inclined deposits are also developed with pseudo-slanted inclined shafts. The inclined shaft development is simpler than the vertical shaft development, the construction speed is fast, and the investment is small. However, due to the small lifting capacity, high operating costs and complicated management, it is often used to develop medium and small mines that are not buried deep, and large mines are used less. With the development of belt conveyors, it is possible to use inclined shafts for large or very large mines.
In foreign countries, many mines use the belt conveyor to develop the inclined shaft and develop to a large scale. The bandwidth is up to 1400~2000mm, the length of single machine has exceeded 1000m, the length of inclined shaft is 2000~4000m, the uphill of belt conveyor can reach 18°~20°, the downhill slope is 15°~16°, the degree of automation is higher and higher, safe. Facilities and protective equipment are improving day by day.
In China, more inclined to open up the use of the metal mines and uranium mines. Belt conveyors for lifting individual mine ores, such as iron ore jade depression. In addition to lifting ore, inclined wells can also be used as auxiliary wells, such as ventilation wells, measure wells, filling wells and drainage wells.
According to the relative position of the inclined well and the ore body, the applicable conditions and technical requirements for the inclined well development method are shown in Table 1.
There are three types of inclined shafts: trolleys (trailers), buckets and belt conveyors.
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