With the continuous increase of the mining intensity of mineral resources, the shallow resources are gradually exhausted. In order to meet the demand for mineral resources in the rapid development of the national economy, the exploitation of mineral resources has to be deepened. In recent years, with the increase of mining depth, the cost of open-pit mining has become larger and larger, which has led to a downward trend in the proportion of open-pit mining. Open pit mining is preferred when conditions permit, as it has the following outstanding advantages over underground mining: (1) Due to the limited restriction of mining space, large-scale mechanized equipment can be used, which is conducive to automation, which can greatly increase the mining intensity and ore production. (2) High labor productivity. The labor productivity of open pit mining is more than 5 to 10 times that of underground mining. (3) The low mining cost is conducive to large-scale mining of low-grade ore. (4) The ore loss is small and the precious mineral resources can be fully recovered. (5) Short construction time and low capital investment. (6) Good working conditions and safe work. However, open pit mining has also brought a series of problems: (1) During the mining process, the dust is large when piercing, blasting, loading, transporting, unloading and discharging. When the automobile is transported, the toxic and harmful gases are discharged into the atmosphere. The harmful components of the dumping ground flow into rivers, lakes and farmland. Etc., causing pollution to the atmosphere, water and soil, and open pits destroy the surface topography. (2) The dump site occupies a large amount of land resources. (3) It is susceptible to climatic conditions. Aluminum Coil is widely used in different industry.We use aluminum polished coil in those application which require high quality of the surface condition.Such as cosmetic packing,LED lights,handbag or some electronic or automobile parts.Aluminum coil is easy to pack and transport and Trumony controls aluminum polish coil with strict internal control standard which makes sure our clients can use this aluminum polished coil with high production yield.Trust in harmony,we care what our clients care. Polished Coils,3003 Aluminum Coil,1050 Aluminum Coil,Aluminum Polished Coil Trumony Aluminum Limited , https://www.szaluminumsheets.com
Open-pit mining is a mining method that directly extracts useful minerals from the surface, including mechanical mining and hydraulic mining. Hydraulic mining is mainly used for the mining of loose sand deposits. The high-pressure water jets sprayed by water guns are used to dig sand mines, transport mortar through sand pumps, or directly with sand mining vessels; mechanical mining is to use certain mining and transportation equipment in open spaces. Mining operations in the area.