π型钢放顶煤的优越性

Advantages of Caving Roof Coal with π Type Steel Beams

π放工艺采煤方法适应地质条件复杂、断层多、块段小、煤层厚度不均、煤质松软破碎的条件,具有采区生产系统简单、单产高、搬家次数少、工人劳动强度低、安全性高、占用设备少、工效高、材料消耗低及经济效益高等优点,近几年来被广泛采用。

Coal caving mining technology with π type steel beams was suitable to complex geological conditions as well as conditions of many faults,small block sections,uneven coal thickness,soft and cracked coal,the technology had advantages of simple mining area production system,high per unit area yield,few moving times,low labour intensity,high safety,few occupied equipments,high work efficiency,low material consumption,high economic benefit and so on,and the technology was widely applied in recent years.