New development of sets equipment technologies for coal mine long-wall face in China

来源 :煤炭学报(英文版) | 被引量 : 0次 | 上传用户:chaocui41
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Background of the development and achievement on sets equipment technologies for coal mine longwall face in China was reviewed initially.On the theoretical side,a coupling model of hydraulic support and surrounding rock,support parameters optimization and three-dimensional (3D) dynamic design method were presented.On the practical side,this paper outlined some of practical issues and discussed some relative methods and technologies.In thin seam coal longwall mining,how to lower equipment height is the first problem that should be solved.Roof pressure regularity,control of roof-fall and collapse,and hydraulic support stability were investigated preferentially in 5~7 m coal seam longwall mining.The application of equipment for longwall mining with 5~7 m cutting height in China was concluded.The characteristics of full-mechanized top coal caving for extra thick seam coal were presented.The automation of top-caving hydraulic support and relevant equipment have achieved important breakthrough.At the end of this paper,further development of China’s coal industry and longwall mining technologies and equipment were prospected in brief.This paper gives readers a comprehensive understanding of China’s coal mine longwall face equipment technologies.It will give help to other countries on its coal mining development.
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