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文中针对无底柱分段崩落法传统采准设计方法导至回采进路严重偏高原设计位置，加大了矿石的贫化损失，简要阐述了进路偏离产生的原因及控制方法，并对原采准设计施工作了突破性改进，通过现场试验、实践达到理想效果，有较好的应用价值，该方法已在清洁铁矿总公司西矿采准设计施工中全面推广应用。
In this paper, the traditional design method of subsidence-free subsidence method without pillar has been introduced to lead the serious approach to the design of the upper plateau of the recovery road, increasing the depletion loss of ore. The causes and control methods of the approach deviation are briefly described. Mining design and construction made a breakthrough improvement, through field tests, to achieve the desired effect of practice, has good value for money, the method has been clean iron ore mining company in the West Mining Design and Construction of a comprehensive promotion and application.