Abstract
Automatic mining technology is the ideal path and the inevitable way to improve production efficiency, reduce labour intensity and ensure safety for thin coal seam. Recently, while automatic mining technology is increasingly applied in China for thin seams, the corresponding automatic cutting technology has made new advances. Among them, mnemonic cutting technology has been fruitful industrial tested with suitable conditions. Simultaneously, another one called cutting trace pre-set technology of the shearer has been put forward. Using this method, the cutting trace in the area with coal thickness changed and geological structures can be preset. What's more, self-adaptive regulation strategy of cutting trace based on coal-rock recognition by monitoring current of cutting motor was discussed. Then, the main problems and development trends of automatic mining in China was also proposed.
Highlights
The reserves contained in thin coal seams are enormous in China
Among 95 national key coal enterprises, a total of more than 750 thin coal seams exist in 445 coal mines
On the stable geological conditions, automatic mining technology with mnemonic cutting was applied in the panel
Summary
The reserves contained in thin coal seams (less than 1.3 m in thickness) are enormous in China. There are two major automatic mining technologies for thin seams: one using a coal shearer and the other one a plough. According to these applications in China, the geological conditions in these working faces involved were well adapted for automatic mining.
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