Abstract: To eliminate the security risks from metal bolt-rod legacy in front of the long-wall working face.On the basis of time-dependent behavior of bolt anchoring and stability criterion of surrounding rock, the research optimized the reasonable recovery range of the bolt in front of the long-wall working face and developed an recovery equipment of bolt-rod which adopting combined hollow auger drill as main body. It is proved by test on site that the recovery schemes are feasible and practical.