Mining equipment development status of fast advance longwall face in Us

us mining equipment development status in modern fast advance long wall face especialy the development situation of the fist decade in 21st centurywas introduced to provide experience for our productive and efricient mine constoucion and to make beterunderstanding about the advanlages and disadvantages of producive and eficent mine between Us and China. uS has higher average level of development and smaller gap among modern fast advance longwall faces while chinese production and technical equipment lvel only meet or exceed th word's advanced level n mine areas with favorable geological condtons.Thee mines obtained high achievement not only in production but also in safety.Bbut in the old mine areas o reas which havepoor geogical co dtons,there i sil a great gap betweenChina and us both in mining equipment and in safety eficient. untbalanced mining equipmentis the main cifference between China and the ULnited States. o further develop the level of mining equipment and safety management is the important development direction of Chinese coal mine.