张家夏楼铁矿缓倾斜、倾斜中厚至厚大矿体开采方案设计

张家夏楼铁矿矿床上覆有厚大第四系，且为倾斜、缓倾斜中厚至厚大难采矿体。为实现其安全高效开采，分别采用厚跨比法、结构力学梁理论、经验公式法以及数值模拟法，对护顶矿柱厚度进行了计算，确定的最优值为24 m。在此基础上，针对该矿矿体特征，提出了空场进路出矿和下盘脉外出矿的分段空场嗣后充填法2种方案。通过技术经济比较，认为采用遥控铲运机的空场进路出矿方案可有效降低采切工程量，吨矿可比开采成本可降低20%以上，故推荐该矿采用空场进路出矿的分段空场嗣后充填法生产。

Design of the Mining Scheme of Slowly Inclined and Inclined Medium-thickness and Large-thickness Orebody of Zhangjiaxialou Iron Mine

The orebody of Zhangjiaxialou Iron Mine is overlaid with large thickness Quaternary,the orebody belongs to difficult-mined orebody,and it is characterized by slowly inclined and inclined medium-thickness and large-thickness.In order to realize the goal of safety and high efficient mining of the orebody,the thickness of top pillar is calculated by using the method of ratio of thickness and span,beam theory of structural mechanics,empirical formula method and numerical simulation method,the optimal value is 24 m.Based on the above study results,in view of the orebody characteristics,the sublevel open stoping backfilling method based on open stoping approach ore removal and footwall vein ore removal is designed.Through economical and technical comparison,the open stoping approach ore removal scheme based on remote scraper is help for reducing engineering quantity of mining and cutting,and the mining cost per ton can be reduced more than 20％,its performance is better than the other ore removal method,therefore,the sublevel open stoping backfilling method based on open stoping approach ore removel can be regarded as the optimal mining method of the mine.