Research on development status of short-wall mechanized mining technology of continuous miner

In view of the development status of continuous miner short-wall mechanized mining technology,the development history of continuous miner short-wall technology and equipment at home and abroad is briefly described,four short-wall mining methods are listed and the advantages and disadvantages and applicable conditions are compared in detail.Wongawilli mining method with full-air pressure is emphatically introduced,and the main characteristics of the latest continuous miner and auxiliary equipment for different coal seam conditions and mining requirements are summarized and analyzed; Meanwhile,since 2007,the domestic working face characteristics in different mining areas and conditions,equipment matching,key techniques,mining footage and output,roof control etc.are described and studied in detail.Based on field practice,short-wall mining efficiency,working face input,mining cost composition and prediction method were summarized.Research shows that a mature short-wall mining techology has been formed in aspects of equipment manufacturing,excavation and mining technology,working face design,mining pressure management,which has become an important supplement to long-wall fully-mechanized mining technology,and the cost per ton of coal can reach 70～185 yuan，and provides technical support for safety,high efficiency and green mining on boundary coal,irregular coal block and coal under buildings,water bodies and railway resources.Finally,according to the domestic demands,the key parameters of domestic equipment and short-wall rock pressure research are analyzed,and the development of continuous shearer short-wall mining is prospected.