Practice and type selecting of domestic fully mechanized coal mining equipment with large cutting height workface in Erdos region

Firstly, based on dealing with the structure characteristics, movements and failure laws of overlying strata, this paper analyzes the type selection principles of fully mechanized coal mining equipment at shallow supper thick coal seams in the Erdos region. Secondly, type selection practice of domestic fully mechanized coal mining equipments of Na Linmiao No.2 colliery, which is first large cutting height coal mining workface (5.3m) of fully mechanized with 5Mt/a annual output in this field is summarized, and the rationality of type selection is appraised. Finally, it is put forward that this technology has significant testing and guiding meaning.