EQUIPMENT SYSTEM FOR NO-ROADWAY NO-COAL-PILLAR RETAINED ROADWAY MINING METHOD

摘要

An equipment system for a no-roadway no-coal-pillar retained roadway mining method mainly comprises a transition support (3), an end support (4), a back-poling support (5), and a fast withdrawing support (6). A coal face trough does not need to advance in mining, and a coal cutter may be used to cut a neat coal wall at the end of a mining area. The coal wall is used as one roadside of the trough, and the other roadside is formed by means of topping. The roadside is automatically formed after roof caving, thus forming a trough in a stopping process. The coal cutter is under digital control when its end cuts the coal, automatically enabling the end to laterally cut the coal wall to form a vertical line, which is used as the roadside of the trough. A scrapper works in coordination with an arc-shaped coal grabbing plate of the coal cutter to clean up float coal at the end as much as possible. The transition support, the end support, the back-poling support, and the fast withdrawing support can provide support and protection in working, and can move forward along with a coal mining device.