关键词: 掩护支架, 大采高, 综采工作面, 综采支架, 回撤工艺

Abstract: Currently, timber supports are widely used in retraction of supports surface, which have the problems of heavy duty, high risk, large timbers consumption and heavy resource wastes. Five special shield supports retraction method is used innovatively in panel 52306 of Da Liu Ta coal mine. Practice has proved that the method realizes mechanized roof support of terminal areas, availably reducing unsupported area; saving timber about 50% and increasing efficiency about 30% during retraction operation compared with four shield supports retraction technology; reducing labor intensity of workers and ensuring the safety of the support of large mining height fully mechanized mining face.