Research on the Setting of Coal Caving Distance in Thick Coal Seam Long Wall Fully Mechanized Caving Technology
The longwall fully mechanized mining technology can achieve full mining of thick coal seams in one go,with high mining efficiency and safety,and is suitable for mining thick coal seams in western China.The selection of coal caving spacing plays an important role in the effectiveness of longwall fully mechanized mining.A study and analysis were conducted on the selection and setting of coal caving spacing in the longwall fully mechanized mining process.The results showed that with the increase of coal caving spacing,the top coal caving rate first increased and then decreased,while the gangue content rate first decreased and then slowly increased.At the same time,the setting of coal caving spacing is closely related to the height of the top coal.Reasonable coal caving spacing can be set according to the changes in the top coal of the coal seam to achieve better mining results.
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