Collaborative Mining Technology with Diferent Mining Equipments at the Same Working Face in Thicking Coal Seam

Taking the 4320 working face in Daizhuang Coal Mine as engineering background, the collaborative technology for thicking coal seam in the same working face with diferent mining equipments was studied. Compared with the layout plan that "fully mechanized mining face was only arranged in thick coal seam", the layout plan that "the thin and thick coal seams were mined in the same working face" was difficult, but additional 83 000 t coal could be mined; on condition that without violating Regulations for Coal Mine Safety, two sets of fully mechanized equipments connected with each other were used to mine the thin and thick coal seams at the same time. The lap joint technology of scraper conveyer, the separation device for coal and gangue, the working face width shortening technology were also analyzed.