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There is no regulation on the division of mining scale, and mines with a production capacity of 50,000 to 10,000 t/a of raw ore can be temporarily classified as medium-sized mines.
Open-pit mining development and transportation are basically road development and automobile transportation.
The exploitation of underground mining is usually carried out by flat mining or inclined wells due to the small scale of mining.
China's diatomite ore layer is developed, the occurrence is gentle, the lithology changes little, and it is layered and layered. The surrounding rocks are mostly basalt . The diatomaceous earth ore has a hardness of 1 to 1.5, a porosity of 80% to 90%, and a bulk density of 0.3 to 0.5 g/cm 2 . Its solidity coefficient is small and it is easy to mine. At present, many mines are manually excavated and soiled. For example, nearly 100 mines in Jixian County, Zhejiang Province are collectively or individually dispersed, with low recovery rate and must be rectified in the future. Towards large-scale, regular mining to protect national resources.
Mining of diatomaceous earth mine
The mining methods of diatomaceous earth are open pit mining and underground mining. The open-pit mining methods include: Jilin Dunhua Gaosongshu Mine, Jilin Meihekou Qujia Street Mine, and Jilin Huadiandian Diatomite Mine. The county is located in the open-pit mine of small-scale soil mining. Pioneer mine in Yunnan Xundian brown coal with high symbiotic, diatomite large reserves, low grade, not buried deep, open-pit mining is possible, but should be considered with the development of high-quality lignite lower part. The underground mining is: Jilin Changbai Maanshan Mine, Jilin Lujiang Liudaogou Mine, and Linjiang West Hill Mine.